Fix release workflow artifact pattern mismatch (#1154)

## Problem
The v0.56.1 release failed with "No files found to publish" error during
PyPI upload. Investigation revealed a configuration race condition
between the build and release jobs.

## Root Cause
- **Build job** uploads artifact with name: `wheels`
- **Release job** downloads with pattern: `wheels-*`
- **Pattern mismatch**: `wheels` ≠ `wheels-*`
- **Result**: 0 artifacts downloaded → PyPI upload fails

## Evidence from Failed Run
```
Found 1 artifact(s)
Filtering artifacts by pattern 'wheels-*'
Filtered from 1 to 0 artifacts
Total of 0 artifact(s) downloaded
error: No files found to publish
```

## Solution
Update the artifact download pattern to match the actual artifact name:
```yaml
# Before
pattern: wheels-*

# After  
pattern: wheels
```

## Testing
This change will allow the release job to properly download the wheel
artifacts created by the build job, enabling successful PyPI uploads.

## Related
- Fixes the v0.56.1 release failure:
https://github.com/codegen-sh/codegen/actions/runs/15960085099
- Resolves the configuration race condition between build and release
jobs

---

[💻 View my work](https://codegen.com/agent/trace/46128) • [About
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Co-authored-by: codegen-sh[bot] <131295404+codegen-sh[bot]@users.noreply.github.com>
Co-authored-by: Edo Pujol <ed@codegen.com>

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