SDL_rtf: ci: bump actions/checkout

SDL Commits
1 
From b1b760fa5990b1c552ed6227fde9d15fd77cf4ff Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Fri, 16 Aug 2024 00:13:04 +0200
Subject: [PATCH] ci: bump actions/checkout

---
 .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 702ad01..1cba35e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -73,7 +73,7 @@ jobs:
           libharfbuzz-dev \
           pkg-config \
           ${NULL+}
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: recursive