CI: set NUGET_PACKAGES for release as well

Author: ForNeVeR

.github/workflows/release.yml

@@ -14,6 +14,8 @@ on:
 jobs:
   publish:
     runs-on: ubuntu-22.04
+    env:
+      NUGET_PACKAGES: ${{ github.workspace }}/.github/nuget-packages
     steps:
       - name: Read version from Git ref
         id: version