chore(deps): bump DavidAnson/markdownlint-cli2-action in the all group

Bumps the all group with 1 update: [DavidAnson/markdownlint-cli2-action](https://github.com/davidanson/markdownlint-cli2-action).


Updates `DavidAnson/markdownlint-cli2-action` from 19.1.0 to 20.0.0
- [Release notes](https://github.com/davidanson/markdownlint-cli2-action/releases)
- [Commits](DavidAnson/markdownlint-cli2-action@v19.1.0...v20.0.0)

---
updated-dependencies:
- dependency-name: DavidAnson/markdownlint-cli2-action
  dependency-version: 20.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/files.yml

@@ -35,7 +35,7 @@ jobs:
         uses: actions/[email protected]
 
       - name: markdownlint-cli2-action
-        uses: DavidAnson/markdownlint-cli2-action@v19.1.0
+        uses: DavidAnson/markdownlint-cli2-action@v20.0.0
 
   editorconfig-checker:
     runs-on: ubuntu-latest