SDL: README-migration.md: Point to the SDL_gesture repository.

From 7b25f044760b7b3042e5f4b0d96137cd1045b370 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Sat, 17 Dec 2022 13:04:28 -0500
Subject: [PATCH] README-migration.md: Point to the SDL_gesture repository.

---
 docs/README-migration.md | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/docs/README-migration.md b/docs/README-migration.md
index dea54ff72803..a4295636b7df 100644
--- a/docs/README-migration.md
+++ b/docs/README-migration.md
@@ -341,7 +341,11 @@ The following hints have been removed:
 
 ## SDL_gesture.h
 
-The gesture API has been removed. There is no replacement planned.
+The gesture API has been removed. There is no replacement planned in SDL3.
+However, the SDL2 code has been moved to a single-header library that can
+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_render.h