[github-actions] Add an explicit apt-get update before attempting to …

…install packages on ubuntu

.github/workflows/build.yml

@@ -8,6 +8,7 @@ jobs:
     steps:
     - name: install dependencies
       run: |
+          sudo apt-get update
           sudo apt-get install libusb-1.0-0-dev
     - name: prepare environment
       run: |