update for main branch

Author: ianhi

.github/workflows/docs.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Build
         run: make -C docs html
       - name: Publish
-        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
+        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/main.yml

@@ -3,10 +3,10 @@ name: Tests
 on:
   push:
     branches:
-    - master
+    - main
   pull_request:
     branches:
-    - master
+    - main
 
 defaults:
   run:

.github/workflows/mpl-latest.yml

@@ -5,10 +5,10 @@ on:
     - cron: "0 12 * * 1" # monday at noon UTC
   push:
     branches:
-    - master
+    - main
   pull_request:
     branches:
-    - master
+    - main
 
 jobs:
   run: