SDL: SDL_mutex.h: Fixed code example.

SDL Commits
1 
From c318b1f9263dda585198047bc2e82ca0767d5085 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Thu, 13 Mar 2025 10:07:44 -0400
Subject: [PATCH] SDL_mutex.h: Fixed code example.

---
 include/SDL3/SDL_mutex.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/SDL3/SDL_mutex.h b/include/SDL3/SDL_mutex.h
index c88ec153153a9..f1b66404687b1 100644
--- a/include/SDL3/SDL_mutex.h
+++ b/include/SDL3/SDL_mutex.h
@@ -942,7 +942,7 @@ typedef enum SDL_InitStatus
  * Here is an example of using this:
  *
  * ```c
- *    static SDL_AtomicInitState init;
+ *    static SDL_InitState init;
  *
  *    bool InitSystem(void)
  *    {