chore: update formatting of commit message as well

Author: SimenB

.github/workflows/automatic-updates.yml

@@ -27,7 +27,7 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           branch: update-branch
           base: main
-          commit-message: "feat: Node.js ${{ steps.updt.outputs.result.updatedVersions.join(', ') }}"
+          commit-message: "feat: Node.js ${{ steps.updt.outputs.result.updatedVersionsString }}"
           title: "feat: Node.js ${{ steps.updt.outputs.result.updatedVersionsString }}"
           delete-branch: true
           team-reviewers: |