[fix] Xcode version 수정

Author: stealmh

.github/workflows/build_test.yml

@@ -20,7 +20,7 @@ jobs:
     - name: Set up Xcode
       uses: maxim-lobanov/setup-xcode@v1
       with:
-        xcode-version: latest-stable
+        xcode-version: '16.1'
 
     - uses: shimataro/ssh-key-action@v2
       with: