fix: avoid function calls in GH action script

Author: SimenB

.github/workflows/automatic-updates.yml

@@ -28,7 +28,7 @@ jobs:
           branch: update-branch
           base: main
           commit-message: "feat: Node.js ${{ steps.updt.outputs.result.updatedVersions.join(', ') }}"
-          title: "feat: Node.js ${{ steps.updt.outputs.result.updatedVersions.join(', ') }}"
+          title: "feat: Node.js ${{ steps.updt.outputs.result.updatedVersionsString }}"
           delete-branch: true
           team-reviewers: |
             @nodejs/docker

build-automation.mjs

@@ -100,6 +100,6 @@ export default async function(github) {
     const { stdout } = (await exec(`git diff`));
     console.log(stdout);
 
-    return { updatedVersions };
+    return { updatedVersions, updatedVersionsString: updatedVersions.join(', ') };
   }
 }