Bump DavidAnson/markdownlint-cli2-action from 16 to 19

Bumps [DavidAnson/markdownlint-cli2-action](https://github.com/davidanson/markdownlint-cli2-action) from 16 to 19.
- [Release notes](https://github.com/davidanson/markdownlint-cli2-action/releases)
- [Commits](DavidAnson/markdownlint-cli2-action@v16...v19)

---
updated-dependencies:
- dependency-name: DavidAnson/markdownlint-cli2-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/linters.yaml

@@ -55,7 +55,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Run markdownlint
-        uses: DavidAnson/markdownlint-cli2-action@v16
+        uses: DavidAnson/markdownlint-cli2-action@v19
 
   mypy:
     name: mypy