Fixed spelling error in forms documentation.

docs/base-css.html

@@ -967,7 +967,7 @@ For example, <code>section</code> should be wrapped as inline.
 </pre>
 
           <h3>Textarea</h3>
-          <p>Form control which supports multiple lines of text. Change <code>row</code> attribute as necessary.</p>
+          <p>Form control which supports multiple lines of text. Change <code>rows</code> attribute as necessary.</p>
           <form class="bs-docs-example form-inline">
             <textarea rows="3"></textarea>
           </form>