Use XCode 16.1

Author: j-piasecki

.github/workflows/build-ios.yml

@@ -30,6 +30,9 @@ jobs:
       group: build-ios-${{ github.ref }}
       cancel-in-progress: true
     steps:
+      - uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: 16.1
       - name: Check out Git repository
         # v4
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683