docs(changelog): 📝 update changelog

Author: MerleLiuKun

CHANGELOG.md

@@ -2,7 +2,14 @@
 
 All notable changes to this project will be documented in this file.
 
-## [0.7.5](https://github.com/sns-sdks/python-twitter/v0.7.4) (2021-02-17)
+## [0.7.6](https://github.com/sns-sdks/python-twitter/v0.7.6) (2021-04-07)
+
+### Features
+
+- New apis for bookmarks.
+- New initial parameters `client secret` for `Confidential Clients`.
+
+## [0.7.5](https://github.com/sns-sdks/python-twitter/v0.7.5) (2021-02-17)
 
 ### Features
 

docs/docs/authorization_oauth2.md

@@ -19,6 +19,15 @@ from pytwitter import Api
 api = Api(client_id='your client id', oauth_flow=True)
 ```
 
+!!! tip "Tips"
+
+    If your app is belong to `Confidential clients`. You need also provide `Client Secret`. 
+
+```python
+from pytwitter import Api
+api = Api(client_id='your client id', client_secret="your client secret", oauth_flow=True)
+```
+
 By default, The callback uri is `https://localhost/`, You need add this url to App's `Authentication settings`.
 
 ### Get authorization url