sdl12-compat: update CI watcom workflow to pull the SDL2 branch.

SDL Commits
1 
From 9a3e5bcb0a08d6e2dacc2616ec4cb6a53e60fb17 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sun, 6 Aug 2023 14:11:10 +0300
Subject: [PATCH] update CI watcom workflow to pull the SDL2 branch.

---
 .github/workflows/watcom.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/watcom.yml b/.github/workflows/watcom.yml
index 960487d82..0c9e6c978 100644
--- a/.github/workflows/watcom.yml
+++ b/.github/workflows/watcom.yml
@@ -21,7 +21,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: libsdl-org/SDL
-          ref: release-2.24.0
+          ref: SDL2
           path: SDL2
       - name: Build sdl12-compat
         run: |