docs: some details spotted to align with new token types (#10523)

## About the changes
Few places where we can use Backend token instead of CLIENT.

website/docs/reference/api/legacy/unleash/client/features.md

@@ -6,7 +6,7 @@ import SearchPriority from '@site/src/components/SearchPriority';
 
 <SearchPriority level="noindex" />
 
-> In order to access the client API endpoints you need to identify yourself. Unless you're using the `none` authentication method, you'll need to [create a CLIENT token](/how-to/how-to-create-api-tokens.mdx) and add an Authorization header using the token.
+> In order to access the client API endpoints you need to identify yourself. Unless you're using the `none` authentication method, you'll need to [create a Backend token](/how-to/how-to-create-api-tokens.mdx) and add an Authorization header using the token.
 
 ### Fetching Feature Flags {#fetching-feature-toggles}
 

website/docs/reference/api/legacy/unleash/client/metrics.md

@@ -7,7 +7,7 @@ import SearchPriority from '@site/src/components/SearchPriority';
 
 <SearchPriority level="noindex" />
 
-> In order to access the client API endpoints you need to identify yourself. Unless you're using the `none` authentication method, you'll need to [create a CLIENT token](/how-to/how-to-create-api-tokens) and add an Authorization header using the token.
+> In order to access the client API endpoints you need to identify yourself. Unless you're using the `none` authentication method, you'll need to [create a Backend token](/how-to/how-to-create-api-tokens) and add an Authorization header using the token.
 
 ### Send metrics {#send-metrics}
 

website/docs/reference/api/legacy/unleash/client/register.md

@@ -7,7 +7,7 @@ import SearchPriority from '@site/src/components/SearchPriority';
 
 <SearchPriority level="noindex" />
 
-> In order to access the client API endpoints you need to identify yourself. Unless you're using the `none` authentication method, you'll need to [create a CLIENT token](/how-to/how-to-create-api-tokens) and add an Authorization header using the token.
+> In order to access the client API endpoints you need to identify yourself. Unless you're using the `none` authentication method, you'll need to [create a Backend token](/how-to/how-to-create-api-tokens) and add an Authorization header using the token.
 
 ### Client registration {#client-registration}
 

website/docs/reference/terraform.mdx

@@ -37,11 +37,11 @@ The permissions of the API token you use with Terraform and your Unleash [plan](
 
 Example usage:
 ```hcl
-resource "unleash_api_token" "client_token" {
+resource "unleash_api_token" "backend_token" {
-  token_name  = "client_token"
+  token_name  = "backend_token"
   type        = "client"
   expires_at  = "2024-12-31T23:59:59Z"
-  project     = "default"
+  projects    = ["default"]
   environment = "development"
 }
 ```

website/remote-content/sdks.js

@@ -21,10 +21,10 @@ import {
 //
 // type ReadmeData = Readme & { repoUrl: string };
 
-const CLIENT_SIDE_SDK = 'frontend';
+const FRONTEND_SDKS = 'frontend';
-const SERVER_SIDE_SDK = 'backend';
+const BACKEND_SDKS = 'backend';
 
-const serverSideSdks = {
+const backendSdks = {
     'unleash-go-sdk': {
         sidebarName: 'Go',
         branch: 'v5',
@@ -53,7 +53,7 @@ const serverSideSdks = {
     },
 };
 
-const clientSideSdks = {
+const frontendSdks = {
     'unleash-android-proxy-sdk': {
         sidebarName: 'Android (legacy)',
         slugName: 'android-proxy-legacy',
@@ -89,11 +89,11 @@ const clientSideSdks = {
 };
 
 const SDKS = (() => {
-    const serverSide = Object.entries(serverSideSdks).map(
+    const serverSide = Object.entries(backendSdks).map(
-        enrichAdditional({ type: SERVER_SIDE_SDK }),
+        enrichAdditional({ type: BACKEND_SDKS }),
     );
-    const clientSide = Object.entries(clientSideSdks).map(
+    const clientSide = Object.entries(frontendSdks).map(
-        enrichAdditional({ type: CLIENT_SIDE_SDK }),
+        enrichAdditional({ type: FRONTEND_SDKS }),
     );
 
     return Object.fromEntries(serverSide.concat(clientSide));
@@ -101,8 +101,8 @@ const SDKS = (() => {
 
 const getAdmonitions = (sdk) => {
     const admonitions = {
-        [CLIENT_SIDE_SDK]: `To connect to Unleash from a frontend application, you'll need to use the [Unleash front-end API](/reference/front-end-api) ([how do I create an API token?](/how-to/how-to-create-api-tokens.mdx)) or the [Unleash proxy](/reference/unleash-proxy) ([how do I create client keys?](/reference/api-tokens-and-client-keys#proxy-client-keys)).`,
+        [FRONTEND_SDKS]: `To connect to Unleash from a frontend application, you'll need to use the [Unleash front-end API](/reference/front-end-api) ([how do I create an API token?](/how-to/how-to-create-api-tokens.mdx)) or the [Unleash proxy](/reference/unleash-proxy) ([how do I create client keys?](/reference/api-tokens-and-client-keys#proxy-client-keys)).`,
-        [SERVER_SIDE_SDK]: `To connect to Unleash, you'll need your Unleash API url (e.g. \`https://<your-unleash>/api\`) and a [backend API token](/reference/api-tokens-and-client-keys.mdx#backend-tokens) ([how do I create an API token?](/how-to/how-to-create-api-tokens.mdx)).`,
+        [BACKEND_SDKS]: `To connect to Unleash, you'll need your Unleash API url (e.g. \`https://<your-unleash>/api\`) and a [backend API token](/reference/api-tokens-and-client-keys.mdx#backend-tokens) ([how do I create an API token?](/how-to/how-to-create-api-tokens.mdx)).`,
     };
 
     const wrap = (text) => `:::tip\n${text}\n:::`;