Bump gradle/gradle-build-action in /.github/workflows (#386)

Bumps [gradle/gradle-build-action](https://github.com/gradle/gradle-build-action) from 2.3.3 to 2.4.2.
- [Release notes](https://github.com/gradle/gradle-build-action/releases)
- [Commits](gradle/gradle-build-action@v2.3.3...v2.4.2)

---
updated-dependencies:
- dependency-name: gradle/gradle-build-action
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: BAStos525 <[email protected]>

Author: dependabot[bot]

.github/workflows/iroha2-ci.yml

@@ -25,7 +25,7 @@ jobs:
     - name: Validate Gradle wrapper
       uses: gradle/wrapper-validation-action@v1
     - name: Publish package
-      uses: gradle/gradle-build-action@v2.3.3
+      uses: gradle/gradle-build-action@v2.4.2
       with:
         arguments: publish
       env: