SDL: Fix SDL_PLATFORM_UNI typo in migration guide

From 85260aa1801f8c420f404f0c0a53f4a9f58c1676 Mon Sep 17 00:00:00 2001
From: Dav999-v <[EMAIL REDACTED]>
Date: Sun, 23 Aug 2026 17:29:11 +0200
Subject: [PATCH] Fix SDL_PLATFORM_UNI typo in migration guide

SDL_PLATFORM_UNI doesn't actually exist, it seems like it's supposed to
be SDL_PLATFORM_UNIX.
---
 docs/README-migration.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/README-migration.md b/docs/README-migration.md
index 2dc1002f8ab58..97fdbca75f84b 100644
--- a/docs/README-migration.md
+++ b/docs/README-migration.md
@@ -1307,7 +1307,7 @@ The following platform preprocessor macros have been renamed:
 | `__RISCOS__`      | `SDL_PLATFORM_RISCOS`     |
 | `__SOLARIS__`     | `SDL_PLATFORM_SOLARIS`    |
 | `__TVOS__`        | `SDL_PLATFORM_TVOS`       |
-| `__unix__`        | `SDL_PLATFORM_UNI`        |
+| `__unix__`        | `SDL_PLATFORM_UNIX`       |
 | `__VITA__`        | `SDL_PLATFORM_VITA`       |
 | `__WIN32__`       | `SDL_PLATFORM_WIN32`      |
 | `__WINGDK__`      | `SDL_PLATFORM_WINGDK`     |