ci: Improve build.yml

- Change fetch-depth to 0 in release job
- Release job enabled only on the default branch
- Kover skipped on fork PRs

.github/workflows/build.yml

@@ -70,9 +70,11 @@ jobs:
       contents: write
     needs:
       - build
-    if: github.event_name == 'workflow_dispatch' && github.event.inputs.releaseVersion != '' && !endsWith(github.event.inputs.releaseVersion, 'SNAPSHOT')
+    if: github.ref_name == github.event.repository.default_branch && github.event_name == 'workflow_dispatch' && github.event.inputs.releaseVersion != '' && !endsWith(github.event.inputs.releaseVersion, 'SNAPSHOT')
     steps:
       - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5
+        with:
+          fetch-depth: 0
       - name: Create release
         shell: bash
         run: |
@@ -92,7 +94,7 @@ jobs:
       checks: write
       contents: read
       pull-requests: write
-    if: github.event_name == 'pull_request'
+    if: github.repository == 'apter-tech/junit5-robolectric-extension' && github.event_name == 'pull_request'
     steps:
       - name: Download coverage report
         uses: actions/download-artifact@65a9edc5881444af0b9093a5e628f2fe47ea3b2e # v4.1.7