Bump gradle/gradle-build-action from 2.5.1 to 2.6.0 (#46)

Bumps [gradle/gradle-build-action](https://github.com/gradle/gradle-build-action) from 2.5.1 to 2.6.0.
- [Release notes](https://github.com/gradle/gradle-build-action/releases)
- [Commits](gradle/gradle-build-action@v2.5.1...v2.6.0)

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

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

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Validate Gradle Wrapper
         uses: gradle/wrapper-validation-action@v1
       - name: Build with Gradle Wrapper
-        uses: gradle/gradle-build-action@v2.5.1
+        uses: gradle/gradle-build-action@v2.6.0
         with:
           gradle-version: wrapper
           arguments: build
@@ -43,7 +43,7 @@ jobs:
       - name: Validate Gradle Wrapper
         uses: gradle/wrapper-validation-action@v1
       - name: Publish with Gradle Wrapper
-        uses: gradle/gradle-build-action@v2.5.1
+        uses: gradle/gradle-build-action@v2.6.0
         with:
           arguments: publish --full-stacktrace
         env: