ci: update global workflows (#661)

.github/workflows/yaml-lint.yml

@@ -3,6 +3,8 @@
 # Don't make changes to this file in this repo as they will be overwritten with changes made to the same file in
 # the above-mentioned repo.
 
+# Lint yaml files.
+
 name: yaml lint
 
 on:
@@ -10,6 +12,10 @@ on:
     branches: [master, nightly]
     types: [opened, synchronize, reopened]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   yaml-lint:
     runs-on: ubuntu-latest