fix(ci): upgrade iOS target OS version to 18.3.1

Author: artus9033

scripts/.tests.env

@@ -24,7 +24,7 @@ export AVD_ABI=x86
 export ANDROID_DISABLE_AVD_TESTS=1
 
 ## IOS ##
-export IOS_TARGET_OS="18.1"
+export IOS_TARGET_OS="18.3.1"
 export IOS_DEVICE="iPhone 16"
 export SDK_IOS="iphonesimulator"