CI: run apt-get update before installing libvips

Author: kleisauke

.github/workflows/ci.yml

@@ -31,7 +31,9 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install vips
-        run: sudo apt install -y --no-install-recommends libvips
+        run: |
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends libvips
 
       - name: Install composer dependencies
         run: |