ci: update version of checkout action

Author: creeper5820

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       options: --user 0
     steps:
       - name: Checkout rmcs-navigation
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Run Lua tests directly
         shell: bash