Update turnip_builder.yml

.github/workflows/turnip_builder.yml

@@ -13,7 +13,7 @@ jobs:
 
     - name: Prepare environment
       run: |
-        sudo sed -Ei 's/^# deb-src /deb-src /' /etc/apt/sources.list
+        sudo sed -i 's/^Types: deb$/Types: deb deb-src/' /etc/apt/sources.list.d/ubuntu.sources
         sudo apt update
         sudo apt build-dep mesa -y