SDL_ttf: Added a patch note for SDF support

From 1baab777303aeaaede3a0fa28d77cc79007a4c9a Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Tue, 28 Jan 2025 18:42:37 -0800
Subject: [PATCH] Added a patch note for SDF support

---
 CHANGES.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGES.txt b/CHANGES.txt
index 99af710a..c3281b40 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -40,3 +40,4 @@
     - TTF_UpdateText()
     - TTF_DestroyText()
  * Added TTF_AddFallbackFont() to allow combining fonts with distinct glyph support
+ * Updated SDF font support and added an example of using it with the GPU API