update CI

Author: Freymaurer

.github/workflows/ci.yml

@@ -31,6 +31,8 @@ jobs:
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
     needs: build-test
+    env:
+      NUGET_API_KEY: ${{ secrets.NUGET_API_KEY }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -49,5 +51,5 @@ jobs:
           dotnet pack ./Release.sln -c Release --no-restore -o artifacts
 
       - name: Publish to NuGet
-        if: ${{ secrets.NUGET_API_KEY != '' }}
-        run: dotnet nuget push "artifacts/*.nupkg" --source https://api.nuget.org/v3/index.json --api-key "${{ secrets.NUGET_API_KEY }}" --skip-duplicate
+        if: env.NUGET_API_KEY != ''
+        run: dotnet nuget push "artifacts/*.nupkg" --source https://api.nuget.org/v3/index.json --api-key "$NUGET_API_KEY" --skip-duplicate