CI: use sudo to execute apt-get

Author: mgerhardy

.github/workflows/main.yml

@@ -34,7 +34,7 @@ jobs:
 
         - name: Setup
           run: |
-            apt-get install -y libsdl2-dev libsdl2-mixer-dev libsdl2-net-dev \
+            sudo apt-get install -y libsdl2-dev libsdl2-mixer-dev libsdl2-net-dev \
                  libyajl-dev libglm-dev libsdl2-image-dev libsqlite3-dev liblua5.4-dev zlib1g-dev \
                  pkg-config ninja-build libbox2d-dev=2.4*