rename master to main

Author: ocefpaf

.github/workflows/test_code.yml

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

.github/workflows/test_code_notebooks.yml

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

.github/workflows/test_selenium.yml

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

.github/workflows/test_style_notebooks.yml

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