Switch publish workflows to NuGetKey environment

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: angelovstanton

.github/workflows/publish-mcp-nuget.yml

@@ -18,7 +18,7 @@ jobs:
   publish:
     name: Publish Testimize.MCP.Server to NuGet.org
     runs-on: ubuntu-latest
-    environment: production
+    environment: NuGetKey
 
     steps:
       - name: Checkout Code

.github/workflows/publish-nuget.yml

@@ -20,7 +20,7 @@ jobs:
   publish:
     name: Publish Testimize to NuGet.org
     runs-on: ubuntu-latest
-    environment: production
+    environment: NuGetKey
 
     steps:
       - name: Checkout Code