Update buildpr.yml

Author: gautamdsheth

.github/workflows/buildpr.yml

@@ -12,7 +12,7 @@ permissions: read-all
 
 jobs:
   build_dev_branch:
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
     steps:
     - name: Checkout PnP.Framework
       uses: actions/checkout@v4
@@ -34,7 +34,6 @@ jobs:
       uses: actions/setup-dotnet@v4
       with:
         dotnet-version: |           
-           8.0.x
            9.0.x
     - name: Install PnP.Core dependencies
       run: dotnet restore