fix: readme

vscode links dont show up on github readme

Author: ThisAMJ

README.md

@@ -6,7 +6,7 @@ Syntax highlighting, snippets and autocompletion for the Portal 2 TAS files, usi
 
 ## Installation
 
-1. [Open in VS Code](vscode:extension/Portal2SpeedrunningHub.p2tas)
+1. [Open in VS Code](vscode:extension/Portal2SpeedrunningHub.p2tas) ([Marketplace](https://marketplace.visualstudio.com/items?itemName=Portal2SpeedrunningHub.p2tas))
 2. Press "Install"
 
 ## Release Notes