Update macOS version and add Xcode setup

.github/workflows/publish_iOS.yml

@@ -8,7 +8,8 @@ on:
 
 jobs:
   build:
-    runs-on: macos-latest
+    # issue: https://github.com/dotnet/maui/issues/18632
+    runs-on: macos-13
 
     steps:
       - uses: actions/checkout@v4
@@ -17,6 +18,10 @@ jobs:
         with:
           dotnet-version: 8.0.x
 
+      - uses: maxim-lobanov/setup-xcode@v1
+        with:
+        xcode-version: latest
+
       - name: Import Code-Signing Certificates
         uses: Apple-Actions/import-codesign-certs@v1
         with: