Update installation step for SDL in workflow

Author: pusewicz

.github/workflows/main.yml

@@ -24,8 +24,10 @@ jobs:
           - "4.0.1"
 
     steps:
-      - name: Install sdl
-        run: sudo apt-get install libsdl2-dev -y
+      - name: Update apt and Install sdl
+        run: |
+          sudo apt-get update
+          sudo apt-get install libsdl2-dev -y
       - uses: actions/checkout@v4
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1