Run repo update on basic ubuntu vm

.github/workflows/arch.yml

@@ -76,11 +76,11 @@ jobs:
     name: Update package repository
     needs: [build]
     runs-on: ubuntu-latest
-    container: archlinux
     steps:
     - name: Install dependencies
       run: |
-        pacman -Sy --noconfirm git
+        apt-get update
+        apt-get install -y git
 
     - name: Download artifacts
       uses: actions/download-artifact@v1