set remote url with gh token for delete preview (MetaMask#736)

.github/workflows/delete-preview.yml

@@ -28,15 +28,14 @@ jobs:
         uses: actions/checkout@v3
         with:
           ref: gh-pages
-          token: ${{ secrets.GITHUB_TOKEN }}
       - name: Delete Branch Folder on gh-pages
         if: ${{ github.event.pull_request.head.ref != 'wallet' && github.event.pull_request.head.ref != 'snaps' && github.event.pull_request.head.ref != 'guide' && github.event.pull_request.head.ref != 'assets' && github.event.pull_request.head.ref != 'img' && github.event.pull_request.head.ref != 'search' }}
         run: |
           git config --local user.name "Metamask Preview Bot"
           git config --local user.email "[email protected]"
+          git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git
           git rm -r "${BRANCH_NAME}"
           git commit -m "Delete ${BRANCH_NAME} folder from gh-pages branch"
           git push origin gh-pages
         env:
           BRANCH_NAME: ${{ github.event.pull_request.head.ref }}
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}