Add step before install libsqlite

Author: rojasTob

.github/workflows/ruby.yml

@@ -15,6 +15,7 @@ jobs:
  - uses: actions/checkout@v2
  - name: Setup System
  run: |
+ sudo apt-get update
  sudo apt-get install libsqlite3-dev
  - name: Set up Ruby 2.6
  uses: actions/setup-ruby@v1