can't use GITHUB_REPOSITORY_URL

Author: HowardBraham

.github/scripts/create-platform-release-pr.sh

@@ -298,7 +298,7 @@ create_changelog_pr() {
 
     # Generate Changelog and Test Plan
     echo "Generating changelog via auto-changelog.."
-    yarn auto-changelog update --rc --repo "${GITHUB_REPOSITORY_URL}" --currentVersion "${new_version}" --autoCategorize --useChangelogEntry --useShortPrLink
+    yarn auto-changelog update --rc --repo "https://github.com/MetaMask/metamask-extension" --currentVersion "${new_version}" --autoCategorize --useChangelogEntry --useShortPrLink
 
     # Skip commits.csv for hotfix releases (previous_version_ref is literal "null")
     # - When we create a new major/minor release, we fetch all commits included in the release, by fetching the diff between HEAD and previous version reference.