chore(deps): update dependency whatwg-fetch to v3.6.20 (#5818)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [whatwg-fetch](https://togithub.com/github/fetch) | [`3.6.19` ->
`3.6.20`](https://renovatebot.com/diffs/npm/whatwg-fetch/3.6.19/3.6.20)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/whatwg-fetch/3.6.20?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
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|
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|
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|

---

### Release Notes

<details>
<summary>github/fetch (whatwg-fetch)</summary>

###
[`v3.6.20`](https://togithub.com/github/fetch/blob/HEAD/CHANGELOG.md#3620-2023-12-13)

[Compare
Source](https://togithub.com/github/fetch/compare/v3.6.19...v3.6.20)

##### Bug Fixes

- Response.error().ok === false
([#&#8203;1412](https://togithub.com/JakeChampion/fetch/issues/1412))
([27e1c75](27e1c75f83))

</details>

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frontend/package.json

@@ -117,7 +117,7 @@
     "vite-plugin-svgr": "3.3.0",
     "vite-tsconfig-paths": "4.2.3",
     "vitest": "1.1.1",
-    "whatwg-fetch": "3.6.19"
+    "whatwg-fetch": "3.6.20"
   },
   "optionalDependencies": {
     "orval": "^6.17.0"

frontend/yarn.lock

@@ -7836,10 +7836,10 @@ whatwg-encoding@^2.0.0:
   dependencies:
     iconv-lite "0.6.3"
 
-whatwg-fetch@3.6.19:
-  version "3.6.19"
-  resolved "https://registry.yarnpkg.com/whatwg-fetch/-/whatwg-fetch-3.6.19.tgz#caefd92ae630b91c07345537e67f8354db470973"
-  integrity sha512-d67JP4dHSbm2TrpFj8AbO8DnL1JXL5J9u0Kq2xW6d0TFDbCA3Muhdt8orXC22utleTVj7Prqt82baN6RBvnEgw==
+whatwg-fetch@3.6.20:
+  version "3.6.20"
+  resolved "https://registry.yarnpkg.com/whatwg-fetch/-/whatwg-fetch-3.6.20.tgz#580ce6d791facec91d37c72890995a0b48d31c70"
+  integrity sha512-EqhiFU6daOA8kpjOWTL0olhVOF3i7OrFzSYiGsEMB8GcXS+RrzauAERX65xMeNWVqxA6HXH2m69Z9LaKKdisfg==
 
 whatwg-mimetype@^3.0.0:
   version "3.0.0"