Run workflows on main, not master (#1093)

Author: kyleconroy

.github/workflows/ci-kotlin.yml

@@ -2,7 +2,7 @@ name: kotlin
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
 jobs:
 

.github/workflows/ci-python.yml

@@ -2,7 +2,7 @@ name: python
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
 jobs:
 

.github/workflows/ci.yml

@@ -2,7 +2,7 @@ name: go
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
 jobs:
 

.github/workflows/docker.yml

@@ -2,7 +2,7 @@ name: docker
 on:
   push:
     branches:
-    - master
+    - main
 jobs:
   docker:
     name: push kjconroy/sqlc:devel