refactor: bump master branch to main branch

Author: Peefy

.github/workflows/ci.yaml

@@ -9,7 +9,7 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
 
 jobs:
   build:

README.md

@@ -1,3 +1,7 @@
+[![Go Report Card](https://goreportcard.com/badge/github.com/KusionStack/helm-kcl)](https://goreportcard.com/report/github.com/KusionStack/helm-kcl)
+[![GoDoc](https://godoc.org/github.com/KusionStack/helm-kcl?status.svg)](https://godoc.org/github.com/KusionStack/helm-kcl)
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/KusionStack/helm-kcl/blob/main/LICENSE)
+
 # Helm KCL Plugin
 
 You can use the Helm-KCL-Plugin to

makefile

@@ -53,7 +53,7 @@ bootstrap:
 .PHONY: docker-run-release
 docker-run-release: export pkg=/go/src/github.com/databus23/helm-kcl
 docker-run-release:
-	git checkout master
+	git checkout main
 	git push
 	docker run -it --rm -e GITHUB_TOKEN -v $(shell pwd):$(pkg) -w $(pkg) golang:1.18.1 make bootstrap release