chore: add environment to protect nuget push

Author: ikesnowy

.github/workflows/main.yml

@@ -7,15 +7,13 @@ on:
 
 jobs:
   pack:
+    environment: nuget
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-
-      - name: Setup NuGet.exe for use with actions
-        uses: NuGet/[email protected]
+      - uses: NuGet/[email protected]
         with:
           nuget-api-key: ${{ secrets.NUGETAPIKEY }}
-
       - name: Nuget Push
         run: |
           Version=${GITHUB_REF:10}