devex: Change to a standard prefix, don't mark as skip ci (#5890)

## Summary

Remove `[skip ci]` from the Playwright screenshot update commit message.

## Changes

- **What**: Also changes the lint-and-format commit message to match.
`[automated]` since they're not _fixes_, per se. I'm open to suggestions
there.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5890-devex-Change-to-a-standard-prefix-don-t-mark-as-skip-ci-2806d73d365081acbc13e01c6a98dc8b)
by [Unito](https://www.unito.io)

Co-authored-by: snomiao <snomiao@gmail.com>

.github/workflows/lint-and-format.yaml

@@ -67,7 +67,7 @@ jobs:
           git config --local user.email "action@github.com"
           git config --local user.name "GitHub Action"
           git add .
-          git commit -m "[auto-fix] Apply ESLint and Prettier fixes"
+          git commit -m "[automated] Apply ESLint and Prettier fixes"
           git push
 
       - name: Final validation

.github/workflows/update-playwright-expectations.yaml

@@ -39,6 +39,6 @@ jobs:
         git fetch origin ${{ github.head_ref }}
         git checkout -B ${{ github.head_ref }} origin/${{ github.head_ref }}
         git add browser_tests
-        git commit -m "Update test expectations [skip ci]"
+        git commit -m "[automated] Update test expectations"
         git push origin HEAD:${{ github.head_ref }}
       working-directory: ComfyUI_frontend