Line numbers: Fixed typo on webpage (#1838)

This corrects a small typo on line number's webpage.

plugins/line-numbers/index.html

@@ -27,7 +27,7 @@ <h2>Line Numbers</h2>
   <h1>How to use</h1>
 
   <p>Obviously, this is supposed to work only for code blocks (<code>&lt;pre>&lt;code></code>) and not for inline code.</p>
-  <p>Add the <code>line-numbers</code> class to your desired <code>&lt;pre></code> or any of its ancestors, and the line-numbers plugin will take care of the rest. To given all code blocks line numbers, add the <code>line-numbers</code> class to the <code>&lt;body></code> of the page.</p>
+  <p>Add the <code>line-numbers</code> class to your desired <code>&lt;pre></code> or any of its ancestors, and the line-numbers plugin will take care of the rest. To give all code blocks line numbers, add the <code>line-numbers</code> class to the <code>&lt;body></code> of the page.</p>
   <p>Optional: You can specify the <code>data-start</code> (Number) attribute on the <code>&lt;pre></code> element. It will shift the line counter.</p>
   <p>Optional: To support multiline line numbers using soft wrap, apply the CSS <code>white-space: pre-line;</code> or <code>white-space: pre-wrap;</code> to your desired <code>&lt;pre></code>.</p>
 </section>