chore(ci): add final newline to actionlint.yml

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: yegor256

.github/workflows/actionlint.yml

@@ -16,4 +16,4 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v6
-      - uses: reviewdog/action-actionlint@v1.72.0
+      - uses: reviewdog/action-actionlint@v1.72.0