chore(git): rename master to main

Author: dobrite

.github/workflows/ci.yml

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

.github/workflows/clippy.yml

@@ -1,6 +1,6 @@
 on:
   push:
-    branches: [ staging, trying, master ]
+    branches: [staging, trying, main]
   pull_request:
 
 name: Clippy

.github/workflows/nightly.yml

@@ -1,6 +1,6 @@
 on:
   push:
-    branches: [ master ]        # Do not run on staging / trying
+    branches: [main] # Do not run on staging / trying
   pull_request:
 
 name: Nightly rust

.github/workflows/rustfmt.yml

@@ -1,6 +1,6 @@
 on:
   push:
-    branches: [ staging, trying, master ]
+    branches: [staging, trying, main]
   pull_request:
 
 name: Code formatting check