Update version and change log for release (#18816)

Author: karthiknadig

CHANGELOG.md

@@ -1,14 +1,14 @@
 # Changelog
 
-## 2022.4.0-rc (28 March 2022)
+## 2022.4.0 (30 March 2022)
 
 ### Enhancements
 
 1. Use new pre-release mechanism to install insiders.
    ([#18144](https://github.com/Microsoft/vscode-python/issues/18144))
 1. Add support for detection and selection of conda environments lacking a python interpreter.
    ([#18357](https://github.com/Microsoft/vscode-python/issues/18357))
-1. Retains the state of the Tensorboard webview.
+1. Retains the state of the TensorBoard webview.
    ([#18591](https://github.com/Microsoft/vscode-python/issues/18591))
 1. Move interpreter info status bar item to the right.
    ([#18710](https://github.com/Microsoft/vscode-python/issues/18710))

package-lock.json

@@ -2,7 +2,7 @@
     "name": "python",
     "displayName": "Python",
     "description": "IntelliSense (Pylance), Linting, Debugging (multi-threaded, remote), Jupyter Notebooks, code formatting, refactoring, unit tests, and more.",
-    "version": "2022.4.0-rc",
+    "version": "2022.4.0",
     "featureFlags": {
         "usingNewInterpreterStorage": true
     },