Update README.md

Author: llalexandru00

README.md

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+# Using the Alk VS Code Extension
+1. Install VS Code from the official [page](https://code.visualstudio.com/download).
+2. In the Extensions tag in the left side, check for the "Alk Visual Studio Code EXtension".
+3. Enter the [Alk VS Code Extension](https://github.com/Andreizabo/alk-vscode-extension) repository and check the usage manual.
+
 # Downloading and Running the Interpreter
 
 1. Be sure you have installed the latest version of Java. Alk interpreter works now on Java 1.8.