Update DavidAnson/markdownlint-cli2-action action to v22 (#64)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/markdownlint.yml

@@ -16,7 +16,7 @@ jobs:
       contents: read
     steps:
     - uses: actions/checkout@v6
-    - uses: DavidAnson/markdownlint-cli2-action@v19
+    - uses: DavidAnson/markdownlint-cli2-action@v22
       with:
         globs: |
           **/*.md