updated github action

Author: Mark Lanning

.github/workflows/pull_requests.yml

@@ -23,11 +23,11 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v3
 
-    - name: Setup .NET 8.0.x
+    - name: Setup .NET 9.0.x
       uses: actions/setup-dotnet@v3
       with:
         # Semantic version range syntax or exact version of a dotnet version
-        dotnet-version: '8.0.x'
+        dotnet-version: '9.0.x'
 
     # You can test your matrix by printing the current dotnet version
     - name: Display dotnet version