Use macos-14 runner for iOS CI tests.

Author: freakboy3742

.github/workflows/build.yml

@@ -392,7 +392,7 @@ jobs:
     needs: build-context
     if: needs.build-context.outputs.run-ios == 'true'
     timeout-minutes: 60
-    runs-on: macos-15
+    runs-on: macos-14
     steps:
       - uses: actions/checkout@v4
         with: