Bump DavidAnson/markdownlint-cli2-action from 17 to 19 (#72)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/lint.yml

@@ -15,6 +15,6 @@ jobs:
         uses: actions/checkout@v4
       - uses: gautamkrishnar/keepalive-workflow@v2
       - name: Lint
-        uses: DavidAnson/markdownlint-cli2-action@v17
+        uses: DavidAnson/markdownlint-cli2-action@v19
         with:
           globs: '**/*.md'