Bump actions/checkout from 4 to 5 (#74)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: macos-15
     steps:
       - name: git checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: xcode version
         run: xcodebuild -version -sdk