Updated migration documentation for functions that now return temporary memory

docs/README-migration.md

@@ -298,6 +298,10 @@ The following symbols have been renamed:
 The following symbols have been removed:
 * SDL_MIX_MAXVOLUME - mixer volume is now a float between 0.0 and 1.0
 
+## SDL_clipboard.h
+
+SDL_GetClipboardText() and SDL_GetPrimarySelectionText() return a const pointer to temporary memory, which does not need to be freed. You can use SDL_ClaimTemporaryMemory() to convert it to a non-const pointer that should be freed when you're done with it.
+
 ## SDL_cpuinfo.h
 
 The intrinsics headers (mmintrin.h, etc.) have been moved to `<SDL3/SDL_intrin.h>` and are no longer automatically included in SDL.h.
@@ -454,6 +458,10 @@ The following functions have been removed:
 The following enums have been renamed:
 * SDL_eventaction => SDL_EventAction
 
+## SDL_filesystem.h
+
+SDL_GetBasePath() and SDL_GetPrefPath() return a const pointer to temporary memory, which does not need to be freed. You can use SDL_ClaimTemporaryMemory() to convert it to a non-const pointer that should be freed when you're done with it.
+
 ## SDL_gamecontroller.h
 
 SDL_gamecontroller.h has been renamed SDL_gamepad.h, and all APIs have been renamed to match.
@@ -686,6 +694,10 @@ be dropped into an SDL3 or SDL2 program, to continue to provide this
 functionality to your app and aid migration. That is located in the
 [SDL_gesture GitHub repository](https://github.com/libsdl-org/SDL_gesture).
 
+## SDL_guid.h
+
+SDL_GUIDToString() returns a const pointer to the string representation of a GUID.
+
 ## SDL_haptic.h
 
 Gamepads with simple rumble capability no longer show up in the SDL haptics interface, instead you should use SDL_RumbleGamepad().
@@ -1017,6 +1029,10 @@ The following symbols have been renamed:
 
 SDL_LoadFunction() now returns `SDL_FunctionPointer` instead of `void *`, and should be cast to the appropriate function type. You can define SDL_FUNCTION_POINTER_IS_VOID_POINTER in your project to restore the previous behavior.
 
+## SDL_locale.h
+
+SDL_GetPreferredLocales() returns a const array of locale pointers, which does not need to be freed. You can use SDL_ClaimTemporaryMemory() to convert it to a non-const pointer that should be freed when you're done with it.
+
 ## SDL_log.h
 
 The following macros have been removed:
@@ -2054,6 +2070,8 @@ SDL_WindowFlags is used instead of Uint32 for API functions that refer to window
 
 SDL_GetWindowOpacity() directly returns the opacity instead of using an out parameter.
 
+SDL_GetWindowICCProfile() returns a const pointer to temporary memory, which does not need to be freed. You can use SDL_ClaimTemporaryMemory() to convert it to a non-const pointer that should be freed when you're done with it.
+
 The following functions have been renamed:
 * SDL_GL_DeleteContext() => SDL_GL_DestroyContext()
 * SDL_GetClosestDisplayMode() => SDL_GetClosestFullscreenDisplayMode()