README: stop advertising using MSSQL (#5973)

README.md

@@ -33,7 +33,7 @@ The Gogs (`/gɑgz/`) project aims to build a simple, stable and extensible self-
 - Jupyter Notebook and PDF rendering.
 - Authentication via SMTP, LDAP, reverse proxy, GitHub.com and GitHub Enterprise with 2FA.
 - Customize HTML templates, static files and many others.
-- Rich database backend, including PostgreSQL, MySQL, SQLite3, MSSQL and [TiDB](https://github.com/pingcap/tidb).
+- Rich database backend, including PostgreSQL, MySQL, SQLite3 and [TiDB](https://github.com/pingcap/tidb).
 - Have localization over [30 languages](https://crowdin.com/project/gogs).
 
 ## 💾 Hardware requirements

README_ZH.md

@@ -30,7 +30,7 @@ Gogs（`/gɑgz/`）项目旨在打造一个以最简便的方式搭建简单、
 - 通过 SMTP、LDAP、反向代理、GitHub.com 和 GitHub 企业版进行用户认证
 - 开启两步验证（2FA）登录
 - 自定义 HTML 模板、静态文件和许多其它组件
-- 多样的数据库后端，包括 PostgreSQL、MySQL、SQLite3、MSSQL 和 [TiDB](https://github.com/pingcap/tidb)
+- 多样的数据库后端，包括 PostgreSQL、MySQL、SQLite3 和 [TiDB](https://github.com/pingcap/tidb)
 - 超过[30 种语言](https://crowdin.com/project/gogs)的本地化
 
 ## 硬件要求