docs(sequelize): hostname shoule be host (#2921)

Author: huowenxuan

docs/source/en/tutorials/sequelize.md

@@ -46,7 +46,7 @@ exports.sequelize = {
 ```js
 config.sequelize = {
   dialect: 'mysql',
-  hostname: '127.0.0.1',
+  host: '127.0.0.1',
   port: 3306,
   database: 'egg-sequelize-doc-default',
 };
@@ -57,7 +57,7 @@ We can configure different data source addresses in different environment config
 ```js
 exports.sequelize = {
   dialect: 'mysql',
-  hostname: '127.0.0.1',
+  host: '127.0.0.1',
   port: 3306,
   database: 'egg-sequelize-doc-unittest',
 };

docs/source/zh-cn/tutorials/sequelize.md

@@ -46,7 +46,7 @@ exports.sequelize = {
 ```js
 config.sequelize = {
   dialect: 'mysql',
-  hostname: '127.0.0.1',
+  host: '127.0.0.1',
   port: 3306,
   database: 'egg-sequelize-doc-default',
 };
@@ -57,7 +57,7 @@ config.sequelize = {
 ```js
 exports.sequelize = {
   dialect: 'mysql',
-  hostname: '127.0.0.1',
+  host: '127.0.0.1',
   port: 3306,
   database: 'egg-sequelize-doc-unittest',
 };