SDL_mixer: ci: bump actions

SDL Commits
1 
From 6229486690ee1f799aa01c1235fb39491d0fbc9d Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Tue, 5 Nov 2024 23:51:36 +0100
Subject: [PATCH] ci: bump actions

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

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index cec93b706..fb6b1e60f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -84,7 +84,7 @@ jobs:
           libwavpack-dev \
           pkg-config \
           ${NULL+}
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: recursive