SDL: Fix reference to nonexistent "README-3ds.md" (50916)

From 509168856f1dba9978accc2329490a6756350284 Mon Sep 17 00:00:00 2001
From: ScolderCreations <[EMAIL REDACTED]>
Date: Thu, 15 May 2025 11:19:33 -0700
Subject: [PATCH] Fix reference to nonexistent "README-3ds.md"

(cherry picked from commit d16371b923fed57e5df676a84435baf1d1061a6a)
---
 docs/README-platforms.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/README-platforms.md b/docs/README-platforms.md
index 77ae411d27385..46a054a8ae1f4 100644
--- a/docs/README-platforms.md
+++ b/docs/README-platforms.md
@@ -11,7 +11,7 @@
 - [macOS](README-macos.md)
 - [NetBSD](README-bsd.md)
 - [Nintendo Switch](README-switch.md)
-- [Nintendo 3DS](README-3ds.md)
+- [Nintendo 3DS](README-n3ds.md)
 - [OpenBSD](README-bsd.md)
 - [PlayStation 2](README-ps2.md)
 - [PlayStation 4](README-ps4.md)