Typo fix in prerequisites.html (#26315)

manual/en/prerequisites.html

@@ -281,7 +281,7 @@ JavaScript. Many <a href="https://eslint.org">linters</a>, programs that check f
 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>
 <pre class="prettyprint showlinemods notranslate lang-js" translate="no">const v = new vector(); // clearly an error if all classes start with a capital letter
-const v = Vector();     // clearly an error if all functions start with a lowercase latter.
+const v = Vector();     // clearly an error if all functions start with a lowercase letter.
 </pre>
 <h1 id="consider-using-visual-studio-code">Consider using Visual Studio Code</h1>
 <p>Of course use whatever editor you want but if you haven't tried it consider
@@ -337,4 +337,4 @@ and transpile the code back to pre ES5 Javascript</a>.</p>
 
 
 
-</body></html>
+</body></html>