Add workaround for NuGet.org .snupkg rejection

Added a workaround to remove .snupkg files without .pdb.

Author: mayuki

.github/workflows/release.yaml

@@ -55,6 +55,8 @@ jobs:
         id: login
         with:
           user: ${{ secrets.NUGET_USER }}
+      # WORKAROUND: NuGet.org rejects `.snupkg` that do not contian `.pdb` files.
+      - run: rm ./publish/MagicOnion.${{ inputs.tag }}.snupkg
       - run: dotnet nuget push "./publish/*.nupkg" --skip-duplicate -s https://api.nuget.org/v3/index.json -k "${NUGET_KEY}"
         if: ${{ !inputs.dry-run }}
         env: