Merge pull request #1222 from kitsiosk/feature/cancel-obsolete-ci-runs

[CI]: Cancel CI runs that become obsolete

.github/workflows/pr-check.yaml

@@ -13,6 +13,10 @@ on:
       - '**.md'
       - '**.MD'
 
+# If two events are triggered within a short time in the same PR, cancel the run of the oldest event
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
 
 jobs:
   validate-pr: