Update to Xcode 15 and iOS 17 SDK for App Store compliance

.github/workflows/build_LoopFollow.yml

@@ -20,11 +20,11 @@ jobs:
   build:
     name: Build
     needs: validate
-    runs-on: macos-12
+    runs-on: macos-13
     steps:
       # Uncomment to manually select latest Xcode if needed
       - name: Select Latest Xcode
-        run: "sudo xcode-select --switch /Applications/Xcode_14.1.app/Contents/Developer"
+        run: "sudo xcode-select --switch /Applications/Xcode_15.0.app/Contents/Developer"
 
       # Checks-out the repo
       - name: Checkout Repo