Fix typo

Snailclimb · Snailclimb · commit fc763b3b36cf · 2019-04-04T18:43:17.000+08:00
diff --git a/README.md b/README.md
@@ -146,7 +146,7 @@
 * [一千行MySQL学习笔记](docs/database/一千行MySQL命令.md)
 * [【思维导图-索引篇】搞定数据库索引就是这么简单](docs/database/MySQL%20Index.md)
 * [事务隔离级别(图文详解)](docs/database/事务隔离级别(图文详解).md)
-* [一条sql语句在MySQL中如何执行的](docs/database/一条sql语句在mysql中如何执行的.md)
+* [一条SQL语句在MySQL中如何执行的](docs/database/一条sql语句在mysql中如何执行的.md)
 
 ### Redis
 
