cmake: switch iOS and watchOS

cmake/sdlplatform.cmake

@@ -11,9 +11,9 @@ macro(SDL_DetectCMakePlatform)
     elseif(CMAKE_SYSTEM_NAME MATCHES ".*tvOS.*")
       set(SDL_CMAKE_PLATFORM tvOS)
     elseif(CMAKE_SYSTEM_NAME MATCHES ".*iOS.*")
-      set(SDL_CMAKE_PLATFORM watchOS)
-    elseif(CMAKE_SYSTEM_NAME MATCHES ".*watchOS.*")
       set(SDL_CMAKE_PLATFORM iOS)
+    elseif(CMAKE_SYSTEM_NAME MATCHES ".*watchOS.*")
+      set(SDL_CMAKE_PLATFORM watchOS)
     elseif (CMAKE_SYSTEM_NAME MATCHES "visionOS")
       set(SDL_CMAKE_PLATFORM visionOS)
     else()