Fix update gatsby fixture cron job (#9725)

This PR fixes the gatsby fixture update script to correctly create pull
requests after it updates the fixtures.

.github/workflows/cron-update-gatsby-fixtures.yml

@@ -8,7 +8,7 @@ on:
     - cron: '0 0 * * 0'
 
 jobs:
-  create-pull-request:
+  update-gatsby-fixtures:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -16,9 +16,12 @@ jobs:
         # 0 means fetch all commits so we can commit and push in the script below
         with:
           fetch-depth: 0
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 14
       - name: Enable corepack
         run: corepack enable pnpm
-      - name: Create Pull Request
+      - name: Update Gatsby Fixtures
         uses: actions/github-script@v6
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

utils/update-gatsby-fixtures.js

@@ -81,10 +81,10 @@ module.exports = async ({ github, context }) => {
       owner,
       repo,
       state: 'open',
-      head: branch,
+      head: `vercel:${branch}`,
     });
 
-    if (pulls.length === 0) {
+    if (pulls.data.length === 0) {
       const pr = await github.rest.pulls.create({
         owner,
         repo,
@@ -94,19 +94,6 @@ module.exports = async ({ github, context }) => {
         body: 'Automatically generated PR to update Gatsby fixture versions in `@vercel/static-build`',
       });
 
-      await github.rest.pulls.requestReviewers({
-        owner,
-        repo,
-        pull_number: pr.data.number,
-        reviewers: [
-          'Ethan-Arrowood',
-          'styfle',
-          'TooTallNate',
-          'EndangeredMassa',
-          'cb1kenobi',
-        ],
-      });
-
       await github.rest.issues.addLabels({
         owner,
         repo,