Fixed issue Pythagora-io#80: Broken Link in README.md: Pythagora Extension Download Link URL Returns 404

- Removed the broken Pythagora Extension Download Link.
- Added the right URL for downloading Pythagora Extension.
- URL test is done and it is working perfectly.

Author: aniket7r

README.md

@@ -17,7 +17,7 @@ The following details are for generating unit tests. To view the docs on how to
 
 # <img src="https://s3.amazonaws.com/assets.pythagora.ai/vscode/vscode_icon.png" alt="Visual Studio Code Logo" width="24" height="24"> Visual Studio Code Extension
 
-If you want to try out Pythagora using Visual Studio Code extension you can download it <a href="https://marketplace.visualstudio.com/items?itemName=PythagoraTechnologies.pythagora-vscode-extension">here</a>.
+If you want to try out Pythagora using Visual Studio Code extension you can download it <a href="https://marketplace.visualstudio.com/items?itemName=PythagoraTechnologies.pythagora-vs-code">here</a>.
 
 # 🏃💨️ Quickstart