Make the CI build dispatchable (#1761)

Fixes CI-132.

Author: maor-rozenfeld

.github/workflows/ci.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches: [main]
   pull_request:
+  workflow_dispatch:
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}