修改readme说明

README.md

@@ -1,5 +1,7 @@
 # Gitea
 
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 [![](https://github.com/go-gitea/gitea/actions/workflows/release-nightly.yml/badge.svg?branch=main)](https://github.com/go-gitea/gitea/actions/workflows/release-nightly.yml?query=branch%3Amain "Release Nightly")
 [![](https://img.shields.io/discord/322538954119184384.svg?logo=discord&logoColor=white&label=Discord&color=5865F2)](https://discord.gg/Gitea "Join the Discord chat at https://discord.gg/Gitea")
 [![](https://goreportcard.com/badge/code.gitea.io/gitea)](https://goreportcard.com/report/code.gitea.io/gitea "Go Report Card")