Update version and change log for release (microsoft#11279)

* Update version * Update change logs

Author: karthiknadig

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## 2020.4.0-rc (9 April 2020)
+## 2020.4.0 (20 April 2020)
 
 ### Enhancements
 
@@ -97,11 +97,13 @@
 1. Fix perf problems after running the interactive window for an extended period of time.
  ([#10971](https://github.com/Microsoft/vscode-python/issues/10971))
 1. Fix problem with opening a notebook in jupyter after saving in VS code.
- ([#11151](https://github.com/Microsoft/vscode-python/issues/11151)) 
+ ([#11151](https://github.com/Microsoft/vscode-python/issues/11151))
 1. Fix CTRL+Z and Z for undo on notebooks.
  ([#11160](https://github.com/Microsoft/vscode-python/issues/11160))
 1. Fix saving to PDF for viewed plots.
  ([#11157](https://github.com/Microsoft/vscode-python/issues/11157))
+1. Fix scrolling in a notebook whenever resizing or opening.
+ ([#11238](https://github.com/Microsoft/vscode-python/issues/11238))
 
 ### Code Health
 

news/2 Fixes/11238.md

@@ -2,7 +2,7 @@
  "name": "python",
  "displayName": "Python",
  "description": "Linting, Debugging (multi-threaded, remote), Intellisense, Jupyter Notebooks, code formatting, refactoring, unit tests, snippets, and more.",
- "version": "2020.4.0-rc",
+ "version": "2020.4.0",
  "languageServerVersion": "0.5.30",
  "publisher": "ms-python",
  "enableProposedApi": false,