SDL: Note that version.rc is public domain.

SDL Commits
1 
From 7ac43cfb6be0559f54a2f4c1b26fe536c10de544 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Sun, 29 Jan 2023 11:43:59 -0500
Subject: [PATCH] Note that version.rc is public domain.

This avoids potential concerns that customizing would qualify a build
of SDL as an "altered source version" under the zlib license.
---
 src/main/windows/version.rc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/windows/version.rc b/src/main/windows/version.rc
index 4ba8782de308..ba0553de8202 100644
--- a/src/main/windows/version.rc
+++ b/src/main/windows/version.rc
@@ -1,4 +1,4 @@
-
+// This file is public domain. Do what you like with it.
 #include "winresrc.h"
 
 LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US