Fix workflow_dispatch (#262)

- sets prerelease version if `release_type` is set to "prerelease" or
"premajor"
- fixes `skip_publish` consitional

Here is the successful run
https://github.com/hazelcast/hazelcast-docs-ui/actions/runs/13819371314/job/38660719763
with 'skip_publish' set to `true` and `release_type` set to "prerelease"
result -
https://github.com/hazelcast/hazelcast-docs-ui/releases/tag/v4.2.2-beta.2

Author: fantkolja

.github/workflows/release.yml

@@ -62,6 +62,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           auto_increment_type: ${{ github.event.inputs.release_type || 'patch' }}
+          prerelease: ${{ github.event.inputs.release_type == 'prerelease' || github.event.inputs.release_type == 'premajor' }}
           prerelease_suffix: beta
           tag_schema: semantic
       - name: Upload release asset
@@ -74,7 +75,7 @@ jobs:
           asset_name: ui-bundle.zip
           asset_content_type: application/zip
   publish:
-    if: ${{ github.event.inputs.skip_publish != true }}
+    if: ${{ github.event_name == 'push' || github.event_name == 'workflow_dispatch' && github.event.inputs.skip_publish == false }}
     runs-on: ubuntu-latest
     needs: release
     steps: