Sanitize branch name in artifact upload step

Author: 1minds3t

.github/workflows/test-uv-binary-switching.yml

@@ -171,7 +171,7 @@ jobs:
         if: always()
         uses: actions/upload-artifact@v4
         with:
-          name: omnipkg-uv-demo-output-${{ github.event.inputs.branch || github.ref_name }}
+          name: omnipkg-uv-demo-output-${{ github.event.inputs.branch || github.ref_name | replace('/', '-') | replace('\\', '-') | replace(':', '-') | replace('*', '-') | replace('?', '-') | replace('"', '-') | replace('<', '-') | replace('>', '-') | replace('|', '-') | replace('\r', '-') | replace('\n', '-') }}
           path: /tmp/omnipkg-artifacts/
           retention-days: 7
           compression-level: 6