Publish through the nuget GitHub environment

Author: SimonCropp

.github/workflows/build.yml

@@ -64,6 +64,7 @@ jobs:
   # policy naming this repository and this workflow file, and returns a key good for an hour.
   publish:
     needs: build
+    environment: nuget
     if: startsWith(github.ref, 'refs/tags/')
     runs-on: ubuntu-latest
     timeout-minutes: 10