chore: bump version to 0.3.8

Fix release workflow immutability issues.

Release includes:
- Drawer opacity fix for namespace detail view (#12)
- Plugin display name change to 'polaris' (#9)
- Repository metadata in package.json (#11)
- E2E tests using on-prem k3s-animaniacs runners (#10)

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

.github/workflows/release.yaml

@@ -71,6 +71,8 @@ jobs:
         with:
           files: ${{ env.TARBALL }}
           fail_on_unmatched_files: true
+          draft: false
+          prerelease: false
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}