Update actions-deploy.md (#32045)

Fixes #32044 in the final snippet using a supported version of .NET

Author: timheuer

docs/architecture/devops-for-aspnet-developers/actions-deploy.md

@@ -411,7 +411,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: 2.1.x
+        dotnet-version: 6.0.x
     - name: Restore dependencies
       run: dotnet restore
     - name: Build