build(deps): bump korelstar/xmllint-problem-matcher from 1.1.0 to 1.2.0

Bumps [korelstar/xmllint-problem-matcher](https://github.com/korelstar/xmllint-problem-matcher) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/korelstar/xmllint-problem-matcher/releases)
- [Commits](korelstar/xmllint-problem-matcher@v1.1.0...v1.2.0)

---
updated-dependencies:
- dependency-name: korelstar/xmllint-problem-matcher
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/gradle.yml

@@ -21,7 +21,7 @@ jobs:
     - name: install xmllint
       run: sudo apt update && sudo apt-get install --no-install-recommends -y libxml2-utils
 
-    - uses: korelstar/xmllint-problem-matcher@v1.1.0
+    - uses: korelstar/xmllint-problem-matcher@v1.2.0
 
     - name: validate HTML templates
       run: find src/main/resources/{templates,pages} -type f -iname "*.html" -exec xmllint --noout {} \;