Merge pull request #35 from skiptools/firebase-xcode-min-ci

Update CI to run on macos-15 due to Xcode 16 being required (firebase/firebase-ios-sdk#14732)

Author: marcprux

.github/workflows/ci.yml

@@ -14,3 +14,7 @@ permissions:
 jobs:
   call-workflow:
     uses: skiptools/actions/.github/workflows/skip-framework.yml@v1
+    with:
+      # Firebase now requires Xcode 16, so it cannot run on macos-13
+      # https://github.com/firebase/firebase-ios-sdk/issues/14732
+      runs-on: "['macos-15']"