dialog: Clean up filter param documentation.

The apostrophe was incorrect, but the type is auto linked in the wiki anyhow,
so don't write it out ourselves.

include/SDL3/SDL_dialog.h

@@ -125,7 +125,7 @@ typedef void (SDLCALL *SDL_DialogFileCallback)(void *userdata, const char * cons
  *                 it will be invoked.
  * \param window the window that the dialog should be modal for, may be NULL.
  *               Not all platforms support this option.
- * \param filters a list of SDL_DialogFileFilter's, may be NULL. Not all
+ * \param filters a list of filters, may be NULL. Not all
  *                platforms support this option, and platforms that do support
  *                it may allow the user to ignore the filters.
  * \param nfilters the number of filters. Ignored if filters is NULL.
@@ -172,7 +172,7 @@ extern SDL_DECLSPEC void SDLCALL SDL_ShowOpenFileDialog(SDL_DialogFileCallback c
  *                 it will be invoked.
  * \param window the window that the dialog should be modal for, may be NULL.
  *               Not all platforms support this option.
- * \param filters a list of SDL_DialogFileFilter's, may be NULL. Not all
+ * \param filters a list of filters, may be NULL. Not all
  *                platforms support this option, and platforms that do support
  *                it may allow the user to ignore the filters.
  * \param nfilters the number of filters. Ignored if filters is NULL.