Typo: update prerequisites.html (#29616)

Small typo in prerequisites page.

> if you follow this rule **you** code will match...

switched to 

> if you follow this rule **your** code will match...

manual/en/prerequisites.html

@@ -271,7 +271,7 @@ someElement.style.width = `${aWidth + bWidth}px`;
 <p>While you're welcome to format your code any way you chose there is at least one
 convention you should be aware of. Variables, function names, method names, in
 JavaScript are all lowerCasedCamelCase. Constructors, the names of classes are
-CapitalizedCamelCase. If you follow this rule you code will match most other
+CapitalizedCamelCase. If you follow this rule your code will match most other
 JavaScript. Many <a href="https://eslint.org">linters</a>, programs that check for obvious errors in your code,
 will point out errors if you use the wrong case since by following the convention
 above they can know when you're using something incorrectly.</p>