Pin to macos-14

Co-authored-by: Russell Keith-Magee <russell@keith-magee.com>

Author: ambv

.github/workflows/ci.yaml

@@ -401,7 +401,7 @@ jobs:
 
   ios:
     needs: [python_sdist, make_ios_matrix]
-    runs-on: macos-15
+    runs-on: macos-14
     strategy:
       fail-fast: false
       matrix: ${{ fromJSON(needs.make_ios_matrix.outputs.matrix_json) }}