SDL_ttf: Correct migration guide for TTF_SizeText/TTF_SizeUTF8

From ce09e4e087bf3bf46962be99ecc1a554fadf9826 Mon Sep 17 00:00:00 2001
From: Gianfranco Berardi <[EMAIL REDACTED]>
Date: Wed, 29 Oct 2025 21:13:10 -0500
Subject: [PATCH] Correct migration guide for TTF_SizeText/TTF_SizeUTF8

According to the .cocci file, they both get replaced by TTF_GetStringSize(), which matches their signatures (aside from the return type) and makes it a simple rename.
---
 docs/README-migration.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/README-migration.md b/docs/README-migration.md
index 6466436c..6bbc7ab4 100644
--- a/docs/README-migration.md
+++ b/docs/README-migration.md
@@ -67,8 +67,8 @@ The following functions have been renamed:
 * TTF_RenderUTF8_Solid_Wrapped() => TTF_RenderText_Solid_Wrapped()
 * TTF_SetFontScriptName() => TTF_SetFontScript()
 * TTF_SetFontWrappedAlign() => TTF_SetFontWrapAlignment()
-* TTF_SizeText() => TTF_GetTextSize()
-* TTF_SizeUTF8() => TTF_GetTextSize()
+* TTF_SizeText() => TTF_GetStringSize()
+* TTF_SizeUTF8() => TTF_GetStringSize()
 
 The following functions have been removed:
 * TTF_ByteSwappedUNICODE()