SDL: docs: Update the migration doc with SDL_SetWindowModalFor() changes

From 9e850bdcfaac6f011631b975b98903b551d95e69 Mon Sep 17 00:00:00 2001
From: Frank Praznik <[EMAIL REDACTED]>
Date: Thu, 5 Sep 2024 16:19:39 -0400
Subject: [PATCH] docs: Update the migration doc with SDL_SetWindowModalFor()
 changes

---
 docs/README-migration.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/README-migration.md b/docs/README-migration.md
index 52276c7d8f313..48a2a73abb943 100644
--- a/docs/README-migration.md
+++ b/docs/README-migration.md
@@ -2173,6 +2173,7 @@ The following functions have been removed:
 * SDL_SetWindowData() - use SDL_GetWindowProperties() instead
 * SDL_CreateWindowFrom() - use SDL_CreateWindowWithProperties() with the properties that allow you to wrap an existing window
 * SDL_SetWindowInputFocus() - use SDL_RaiseWindow() instead
+* SDL_SetWindowModalFor() - use SDL_SetWindowParent() with SDL_SetWindowModal() instead
 
 The SDL_Window id type is named SDL_WindowID