chore: rename master branch to main

.github/workflows/linters.yml

@@ -4,7 +4,7 @@ name: Linters
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
 
 jobs:

.github/workflows/specs_rails60.yml

@@ -4,10 +4,10 @@ name: Specs Rails 6.0
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 jobs:
   tests:

.github/workflows/specs_rails61.yml

@@ -4,10 +4,10 @@ name: Specs Rails 6.1
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 jobs:
   tests:

.github/workflows/specs_rails70.yml

@@ -4,10 +4,10 @@ name: Specs Rails 7.0
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 jobs:
   tests: