github-actions: Bump overtrue/phplint from 8.2 to 9.1

Bumps [overtrue/phplint](https://github.com/overtrue/phplint) from 8.2 to 9.1.
- [Release notes](https://github.com/overtrue/phplint/releases)
- [Changelog](https://github.com/overtrue/phplint/blob/main/CHANGELOG.md)
- [Commits](overtrue/phplint@8.2...9.1)

---
updated-dependencies:
- dependency-name: overtrue/phplint
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/continuous-integration.yml

@@ -82,7 +82,7 @@ jobs:
           tools: "${{ env.TOOLS }}"
 
       - name: "Lint PHP"
-        uses: "overtrue/phplint@8.2"
+        uses: "overtrue/phplint@9.1"
 
   install:
     name: "Install dependencies"