Add workflow_dispatch trigger event

Author: messense

.github/workflows/Build.yml

@@ -3,8 +3,9 @@ on:
     branches:
       - master
   pull_request:
+  workflow_dispatch:
   schedule:
-    - cron: '0 0 * * 2'
+    - cron: '0 0 1 */2 *'
 
 name: Build