SDL: Sync SDL3 wiki -> header (842f8)

From 842f85da05557f168e79ef1c95057223cd3fa7fa Mon Sep 17 00:00:00 2001
From: SDL Wiki Bot <[EMAIL REDACTED]>
Date: Sun, 2 Feb 2025 21:17:22 +0000
Subject: [PATCH] Sync SDL3 wiki -> header

[ci skip]
---
 include/SDL3/SDL_gpu.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/SDL3/SDL_gpu.h b/include/SDL3/SDL_gpu.h
index e558cdd234697..d42e0889c0660 100644
--- a/include/SDL3/SDL_gpu.h
+++ b/include/SDL3/SDL_gpu.h
@@ -4074,6 +4074,8 @@ extern SDL_DECLSPEC bool SDLCALL SDL_QueryGPUFence(
 /**
  * Releases a fence obtained from SDL_SubmitGPUCommandBufferAndAcquireFence.
  *
+ * You must not reference the fence after calling this function.
+ *
  * \param device a GPU context.
  * \param fence a fence.
  *