Use node 22 in automate_renovate_changesets.yml (#1950)

Use node 22 in `automate_renovate_changesets.yml` as it's required by one of the scripts.

Signed-off-by: Vincenzo Scamporlino <vincenzos@spotify.com>

.github/workflows/automate_renovate_changesets.yml

@@ -22,6 +22,12 @@ jobs:
           ref: ${{ github.head_ref }}
           token: ${{ secrets.GH_SERVICE_ACCOUNT_TOKEN }}
 
+      - name: Set up Node
+        uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4
+        with:
+          node-version: 22
+          registry-url: https://registry.npmjs.org/ # Needed for auth
+
       - name: Configure Git
         run: |
           git config --global user.email noreply@backstage.io