Update yaml action

.github/workflows/validate_yaml_files.yml

@@ -1,14 +1,21 @@
 ---
+
+# Based on code from https://github.com/marketplace/actions/yaml-lint
+
 name: Yaml Lint
 
 on:
   pull_request:
       types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
+
+# This validation is equivalent to running on the command line:
+#   yamllint -d relaxed --no-warnings
+# and is controlled by the .yamllint.yml file
 jobs:
   validate-YAML:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - id: yaml-lint
         name: yaml-lint
         uses: ibiqlik/action-yamllint@v3
@@ -17,7 +24,7 @@ jobs:
           format: colored
           config_file: .yamllint.yml
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         if: always()
         with:
           name: yamllint-logfile