fix: Add Production environment to workflow for NUGET_API_KEY access

- Added 'environment: Production' to job configuration
- Allows workflow to access NUGET_API_KEY secret from Production environment
- Fixes NuGet publish authentication

Author: mrdevrobot

.github/workflows/publish.yml

@@ -14,6 +14,7 @@ on:
 jobs:
   build-test-publish:
     runs-on: ubuntu-latest
+    environment: Production
     permissions:
       contents: write # Required for creating GitHub Release and pushing to gh-pages