Add workflow_dispatch trigger to workflows from GitHub

Author: cartland

.github/workflows/copy-branch.yml

@@ -5,6 +5,7 @@ name: Duplicates main to old master branch
 # Controls when the action will run. Triggers the workflow on push or pull request
 # events but only for the main branch
 on:
+  workflow_dispatch:
   push:
     branches: [ main ]
 

.github/workflows/main.yml

@@ -1,6 +1,7 @@
 name: Build
 
 on:
+  workflow_dispatch:
   pull_request:
     branches:
       - main