ci: re-add commit subject length validation

To replace the one removed by commit 5432bc4.

Signed-off-by: Kir Kolyshkin <[email protected]>

Author: kolyshkin

.github/workflows/test.yml

@@ -18,6 +18,24 @@ jobs:
         with:
           version: v1.42
 
+  commit:
+    runs-on: ubuntu-20.04
+    # Only check commits on pull requests.
+    if: github.event_name == 'pull_request'
+    steps:
+      - name: get pr commits
+        id: 'get-pr-commits'
+        uses: tim-actions/[email protected]
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: check subject line length
+        uses: tim-actions/[email protected]
+        with:
+          commits: ${{ steps.get-pr-commits.outputs.commits }}
+          pattern: '^.{0,72}(\n.*)*$'
+          error: 'Subject too long (max 72)'
+
   test:
     runs-on: ubuntu-20.04
     strategy: