Use iPhone 15 in workflow (#866)

* Use iPhone 16 in xcodebuild workflows

* Fix bad merge

* Use iPhone 15

Author: tinder-cfuller

.github/workflows/xcode.yml

@@ -14,7 +14,7 @@ jobs:
     name: Xcode
     runs-on: macos-latest
     env:
-      SIMULATOR: iPhone 14
+      SIMULATOR: iPhone 15
     steps:
     - name: Checkout source
       uses: actions/checkout@v4