doc: build badge linkon the main branch

Author: jee-r

README.md

@@ -1,7 +1,7 @@
 # docker-tinyproxy
 
 [![Docker Image Size (latest by date)](https://img.shields.io/docker/image-size/j33r/tinyproxy?style=flat-square)](https://hub.docker.com/r/j33r/tinyproxy)
-[![GitHub Workflow Status (branch)](https://img.shields.io/github/workflow/status/jee-r/docker-tinyproxy/Deploy/master?style=flat-square)](https://github.com/jee-r/docker-tinyproxy/actions/workflows/deploy.yaml?query=branch%3Amaster)
+[![GitHub Workflow Status (branch)](https://img.shields.io/github/workflow/status/jee-r/docker-tinyproxy/Deploy/main?style=flat-square)](https://github.com/jee-r/docker-tinyproxy/actions/workflows/deploy.yaml?query=branch%3Amain)
 [![Docker Pulls](https://img.shields.io/docker/pulls/j33r/tinyproxy?style=flat-square)](https://hub.docker.com/r/j33r/tinyproxy)
 [![DockerHub](https://img.shields.io/badge/Dockerhub-j33r/proxy%2D-socks-%232496ED?logo=docker&style=flat-square)](https://hub.docker.com/r/j33r/tinyproxy)
 [![ghcr.io](https://img.shields.io/badge/ghcr%2Eio-jee%2D-r/proxy%2D-socks-%232496ED?logo=github&style=flat-square)](https://ghcr.io/jee-r/tinyproxy)