SDL: include: Fix a preformatted piece of documentation that isn't C code.

From 5dc207b3b68375d4a32db9c527bf8e274865b9f6 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Sun, 5 May 2024 01:21:51 -0400
Subject: [PATCH] include: Fix a preformatted piece of documentation that isn't
 C code.

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

diff --git a/include/SDL3/SDL_surface.h b/include/SDL3/SDL_surface.h
index 5e519c6859d56..3b0d6d608328e 100644
--- a/include/SDL3/SDL_surface.h
+++ b/include/SDL3/SDL_surface.h
@@ -875,7 +875,7 @@ extern DECLSPEC int SDLCALL SDL_FillSurfaceRects(SDL_Surface *dst, const SDL_Rec
  * The blit semantics for surfaces with and without blending and colorkey are
  * defined as follows:
  *
- * ```c
+ * ```
  *    RGBA->RGB:
  *      Source surface blend mode set to SDL_BLENDMODE_BLEND:
  *       alpha-blend (using the source alpha-channel and per-surface alpha)