Clarified SDL property thread-safety information

include/SDL3/SDL_properties.h

@@ -121,8 +121,7 @@ extern DECLSPEC int SDLCALL SDL_SetProperty(SDL_PropertiesID props, const char *
  *
  * \threadsafety It is safe to call this function from any thread, although
  *               the data returned is not protected and could potentially be
- *               freed if you call SDL_SetProperty() on this set of properties
- *               or destroy this set of properties from another thread. If you
+ *               freed if you call SDL_SetProperty() or SDL_ClearProperty() on these properties from another thread. If you
  *               need to avoid this, use SDL_LockProperties() and
  *               SDL_UnlockProperties().
  *
@@ -156,8 +155,8 @@ extern DECLSPEC int SDLCALL SDL_ClearProperty(SDL_PropertiesID props, const char
  *
  * \param props the properties to destroy
  *
- * \threadsafety This function should not be called while other threads might
- *               be setting or getting values from this set of properties.
+ * \threadsafety This function should not be called while these properties are locked or other threads might
+ *               be setting or getting values from these properties.
  *
  * \since This function is available since SDL 3.0.0.
  *