Fix CI: use iPhone 16 with iOS 18.2 (available on macos-15)

iOS 17.5 is not pre-installed on the macos-15 runner with Xcode 16.2.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: pavankataria

.github/workflows/ci.yml

@@ -33,5 +33,5 @@ jobs:
         xcodebuild test \
           -project Example/SwiftDataTables.xcodeproj \
           -scheme SwiftDataTables-Example \
-          -destination 'platform=iOS Simulator,name=iPhone 15,OS=17.5' \
+          -destination 'platform=iOS Simulator,name=iPhone 16,OS=18.2' \
           CODE_SIGNING_ALLOWED=NO