feat: display author of changes in workflow tab (#5780)

packages/netlify-cms-backend-gitlab/src/API.ts

@@ -655,12 +655,14 @@ export default class API {
     const label = mergeRequest.labels.find(l => isCMSLabel(l, this.cmsLabelPrefix)) as string;
     const status = labelToStatus(label, this.cmsLabelPrefix);
     const updatedAt = mergeRequest.updated_at;
+    const pullRequestAuthor = mergeRequest.author.name;
     return {
       collection,
       slug,
       status,
       diffs: diffsWithIds,
       updatedAt,
+      pullRequestAuthor,
     };
   }