SDL: Added a migration note about SDL_TouchID and SDL_FingerID

From 594eef99ecaf36377e3f4657c452899bfecaf246 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Thu, 25 Jan 2024 07:30:08 -0800
Subject: [PATCH] Added a migration note about SDL_TouchID and SDL_FingerID

---
 docs/README-migration.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/README-migration.md b/docs/README-migration.md
index 9a0f216778df..a3710534e2c0 100644
--- a/docs/README-migration.md
+++ b/docs/README-migration.md
@@ -1501,6 +1501,8 @@ SDL_GetNumTouchFingers() returns a negative error code if there was an error.
 
 SDL_GetTouchName is replaced with SDL_GetTouchDeviceName(), which takes an SDL_TouchID instead of an index.
 
+SDL_TouchID and SDL_FingerID are now Uint64 with 0 being an invalid value.
+
 The following functions have been removed:
 * SDL_GetNumTouchDevices() - replaced with SDL_GetTouchDevices()
 * SDL_GetTouchDevice() - replaced with SDL_GetTouchDevices()