Update XCODE_VERSION in CI workflow

Author: riteshshukla04

.github/workflows/ci.yml

@@ -122,7 +122,7 @@ jobs:
     runs-on: macos-latest
 
     env:
-      XCODE_VERSION: 16.4
+      XCODE_VERSION: 26
       TURBO_CACHE_DIR: .turbo/ios
       RCT_USE_RN_DEP: 1
       RCT_USE_PREBUILT_RNCORE: 1