Add missing organization.

Author: Nihlus

Diff for: .github/workflows/dotnet.yml

@@ -64,6 +64,7 @@ jobs:
       - name: Prune packages older than 4 versions (new version is the 5th)
         uses: smartsquaregmbh/[email protected]
         with:
+          organization: Remora
           type: nuget
           keep: 4
           names: |