Update apt before installing dependencies

Author: zeux

.github/workflows/build.yml

@@ -23,7 +23,7 @@ jobs:
       run: |
         mv Vulkan-Headers ~/Vulkan-Headers
     - name: install deps for tests
-      run: sudo apt install -y xorg-dev
+      run: sudo apt update && sudo apt install -y xorg-dev
       if: matrix.os == 'ubuntu'
     - name: build main
       shell: bash