update workflow to run on main

Author: Adam Argyle

.github/workflows/main.yml

@@ -2,7 +2,7 @@ name: CI/CD
 on:
   push:
     branches:
-      - master
+      - main
 
 jobs:
   build:
@@ -17,7 +17,7 @@ jobs:
 
       - name: Git Init
         run: |
-          git switch -c master
+          git switch -c main
           git config --global user.email "[email protected]"
           git config --global user.name "Adam Argyle"