Bump gradle/gradle-build-action from 2.1.3 to 3.1.0 (#67)

Bumps [gradle/gradle-build-action](https://github.com/gradle/gradle-build-action) from 2.1.3 to 3.1.0.
- [Release notes](https://github.com/gradle/gradle-build-action/releases)
- [Commits](gradle/gradle-build-action@937999e...29c0906)

---
updated-dependencies:
- dependency-name: gradle/gradle-build-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
       with:
         distribution: 'temurin'
         java-version: 8
-    - uses: gradle/gradle-build-action@937999e9cc2425eddc7fd62d1053baf041147db7 # renovate: tag=v2
+    - uses: gradle/gradle-build-action@29c0906b64b8fc82467890bfb7a0a7ef34bda89e # renovate: tag=v2
       name: gradle
       with:
         arguments: check dokkaHtml dokkaJavadoc