OAuth 2 redirectUri hotfix (#3066)

# Description of Changes

- Reverted path in `OAuth2Configuration` for `redirectUri` back to
'oidc' to fix the Redirect Uri error users were facing when using SSO
with Authentik
- Changed log level for some logs

---

## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [x] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings

### Documentation

- [x] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [x] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [x] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

src/main/java/stirling/software/SPDF/config/security/SecurityConfiguration.java

@@ -285,7 +285,7 @@ public class SecurityConfiguration {
                                 });
             }
         } else {
-            log.info("SAML 2 login is not enabled. Using default.");
+            log.debug("SAML 2 login is not enabled. Using default.");
             http.authorizeHttpRequests(authz -> authz.anyRequest().permitAll());
         }
         return http.build();

src/main/java/stirling/software/SPDF/config/security/oauth2/OAuth2Configuration.java

@@ -200,7 +200,7 @@ public class OAuth2Configuration {
                                 .scope(oidcProvider.getScopes())
                                 .userNameAttributeName(oidcProvider.getUseAsUsername().getName())
                                 .clientName(clientName)
-                                .redirectUri(REDIRECT_URI_PATH + name)
+                                .redirectUri(REDIRECT_URI_PATH + "oidc")
                                 .authorizationGrantType(AUTHORIZATION_CODE)
                                 .build())
                 : Optional.empty();