scad workflow run apt update before install

.github/workflows/scad.yml

@@ -20,7 +20,9 @@ jobs:
         run: git submodule update --init
 
       - name: Install dependencies
-        run: sudo apt-get install -y openscad zip
+        run: |
+          sudo apt update
+          sudo apt-get install -y openscad zip
 
       - name: Render STLs
         run: |