update actions to work on push

.github/workflows/documentation.yml

 name: Documentation
 
 on:
+  push:
+    branches:
+      - main
   workflow_dispatch:
     inputs:
       version:
         description: "Design version"
         required: true
         default: "pre-release"
-
 env:
   # Set this to the base filename of your project.
   BaseFileName: RP2040-VCO

.github/workflows/gerber.yml

 name: Gerber
 
 on:
+  push:
+    branches:
+      - main
   workflow_dispatch:
     inputs:
       version: