fix: code format

Author: AugustinMauroy

apps/site/pages/en/learn/typescript/introduction.md

@@ -74,7 +74,7 @@ These type definitions allow TypeScript to understand Node.js APIs and provide p
 import * as fs from 'fs';
 
 fs.readFile('example.txt', 'foo', (err, data) => {
-//                          ^^^ Argument of type '"foo"' is not assignable to parameter of type …
+  //                          ^^^ Argument of type '"foo"' is not assignable to parameter of type …
   if (err) throw err;
   console.log(data);
 });