[Docs] Add the anchor for the first entry about "HOC" (#3914)

Author: SiarheiBobryk

content/docs/accessibility.md

@@ -226,7 +226,7 @@ class Parent extends React.Component {
 this.inputElement.current.focus();
 ```
 
-When using a HOC to extend components, it is recommended to [forward the ref](/docs/forwarding-refs.html) to the wrapped component using the `forwardRef` function of React. If a third party HOC does not implement ref forwarding, the above pattern can still be used as a fallback.
+When using a [HOC](/docs/higher-order-components.html) to extend components, it is recommended to [forward the ref](/docs/forwarding-refs.html) to the wrapped component using the `forwardRef` function of React. If a third party HOC does not implement ref forwarding, the above pattern can still be used as a fallback.
 
 A great focus management example is the [react-aria-modal](https://github.com/davidtheclark/react-aria-modal). This is a relatively rare example of a fully accessible modal window. Not only does it set initial focus on
 the cancel button (preventing the keyboard user from accidentally activating the success action) and trap keyboard focus inside the modal, it also resets focus back to the element that initially triggered the modal.