Fix release workflow after build system change

In commit d4e84fd, the build system was changed from cibuildwheel to uv build:
- Before: cibuildwheel created multiple platform-specific wheels with names like 'wheels-ubuntu-latest-3.12'
- After: uv build creates a single pure Python wheel uploaded as 'wheels'

However, the release job still used the old pattern 'wheels-*' which no longer matches
the new artifact name 'wheels', causing 0 artifacts to be downloaded and PyPI upload
to fail with 'No files found to publish'.

Changes:
- Update artifact download pattern from 'wheels-*' to 'wheels' to match new build system
- This fixes the v0.56.1 release failure and aligns with the pure Python wheel approach

Fixes: https://github.com/codegen-sh/codegen/actions/runs/15960085099

Author: codegen-sh[bot]

.github/workflows/release.yml

@@ -82,7 +82,7 @@ jobs:
         with:
           path: dist
           merge-multiple: true
-          pattern: wheels-*
+          pattern: wheels
 
       - name: Release PyPI
         uses: ./.github/actions/release-pypi