Bump xt0rted/markdownlint-problem-matcher in /.github/workflows

Bumps [xt0rted/markdownlint-problem-matcher](https://github.com/xt0rted/markdownlint-problem-matcher) from 2 to 3.
- [Release notes](https://github.com/xt0rted/markdownlint-problem-matcher/releases)
- [Changelog](https://github.com/xt0rted/markdownlint-problem-matcher/blob/main/CHANGELOG.md)
- [Commits](xt0rted/markdownlint-problem-matcher@v2...v3)

---
updated-dependencies:
- dependency-name: xt0rted/markdownlint-problem-matcher
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/check-markdown-task.yml

@@ -80,7 +80,7 @@ jobs:
           node-version: ${{ env.NODE_VERSION }}
 
       - name: Initialize markdownlint-cli problem matcher
-        uses: xt0rted/markdownlint-problem-matcher@v2
+        uses: xt0rted/markdownlint-problem-matcher@v3
 
       - name: Install Task
         uses: arduino/setup-task@v2