workflow: Update branches to master only

Author: stffrdhrn

.github/workflows/ci.yml

@@ -2,7 +2,7 @@ name: CI
 
 on:
   push:
-    branches: ["main"]
+    branches: ["master"]
   pull_request:
 
 jobs:

.github/workflows/pages.yml

@@ -8,9 +8,8 @@ name: Deploy OpenRISC tutorials site to Pages
 
 on:
   push:
-    branches: 
+    branches:
       - master
-      - just-the-docs
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch: