deps(deps): update davidanson/markdownlint-cli2-action action to v20 (#100)

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

Author: renovate[bot]

.github/workflows/coding-standards.yml

@@ -60,7 +60,7 @@ jobs:
         uses: actions/checkout@v4.2.2
 
       - name: 🧐 Lint Markdown files
-        uses: DavidAnson/markdownlint-cli2-action@v19.1.0
+        uses: DavidAnson/markdownlint-cli2-action@v20.0.0
         with:
           config: '.github/.markdownlint.json'
           globs: |