Bump whatwg-fetch from 3.6.19 to 3.6.20 (#398)

Bumps [whatwg-fetch](https://github.com/github/fetch) from 3.6.19 to 3.6.20.
- [Release notes](https://github.com/github/fetch/releases)
- [Changelog](https://github.com/JakeChampion/fetch/blob/main/CHANGELOG.md)
- [Commits](JakeChampion/fetch@v3.6.19...v3.6.20)

---
updated-dependencies:
- dependency-name: whatwg-fetch
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -192,7 +192,7 @@
     "typescript": "^5.2.2",
     "wait-on": "^7.0.1",
     "webpack": "^5.88.2",
-    "whatwg-fetch": "^3.6.18"
+    "whatwg-fetch": "^3.6.20"
   },
   "packageManager": "[email protected]"
 }

yarn.lock

@@ -7883,7 +7883,7 @@ __metadata:
     typescript: ^5.2.2
     wait-on: ^7.0.1
     webpack: ^5.88.2
-    whatwg-fetch: ^3.6.18
+    whatwg-fetch: ^3.6.20
   languageName: unknown
   linkType: soft
 
@@ -10975,10 +10975,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"whatwg-fetch@npm:^3.6.18":
-  version: 3.6.19
-  resolution: "whatwg-fetch@npm:3.6.19"
-  checksum: 2896bc9ca867ea514392c73e2a272f65d5c4916248fe0837a9df5b1b92f247047bc76cf7c29c28a01ac6c5fb4314021d2718958c8a08292a96d56f72b2f56806
+"whatwg-fetch@npm:^3.6.20":
+  version: 3.6.20
+  resolution: "whatwg-fetch@npm:3.6.20"
+  checksum: c58851ea2c4efe5c2235f13450f426824cf0253c1d45da28f45900290ae602a20aff2ab43346f16ec58917d5562e159cd691efa368354b2e82918c2146a519c5
   languageName: node
   linkType: hard