Try fixing YAML syntax

Author: 0x17

.github/workflows/main.yml

@@ -93,6 +93,8 @@ jobs:
         if: startsWith(github.ref, 'refs/tags/')
         uses: softprops/action-gh-release@v2
         with:
-          files: [cuopt-link-release.zip, cu12-runtime.zip]
+          files: |
+            cuopt-link-release.zip
+            cu12-runtime.zip
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}