Use XCode 16 in the CI builds (#454)

* Use XCode 16 in the CI builds

* use the macos-14 build agent

Author: Numpsy

.github/workflows/pull-requests.yml

@@ -7,11 +7,11 @@ on:
 jobs:
   build:
 
-    runs-on: macos-13
+    runs-on: macos-14
 
     steps:
     - name: xCode
-      run: sudo xcode-select -s /Applications/Xcode_15.1.app/Contents/Developer/
+      run: sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer/
 
     - uses: actions/checkout@v4
     - name: Setup .NET