Allow to manually trigger build with workflow_dispatch (#98)

Allow to manually trigger build with `workflow_dispatch`.

Author: santisoler

.github/workflows/build.yml

@@ -9,6 +9,7 @@ on:
     # * is a special character in YAML so you have to quote this string
     # Run every Monday at 12:00 UTC
     - cron:  '00 12 * * 1'
+  workflow_dispatch:
 
 permissions: {}