Merge pull request #22 from SAP-docs/markdownlint-fix

Address markdownlint issue by pinning

Author: qmacro

.github/workflows/markdown-checks.yaml

@@ -47,7 +47,7 @@ jobs:
         npm install \
           --no-package-lock \
           --no-save \
-          markdownlint-cli markdownlint-rule-titlecase markdownlint-rule-helpers
+          markdownlint-cli@0.27 markdownlint-rule-titlecase markdownlint-rule-helpers@0.18
 
     - id: run_linter
       if: steps.check_files_changed.outputs.changed_files