Added link text for empty link directing to Understanding Techniques (#4541)

Closes: #3101

Added content for empty link.

Co-authored-by: Mike Gower <[email protected]>

Author: giacomo-petri

understanding/conformance.html

@@ -1040,7 +1040,7 @@ <h4>Sufficient Techniques for Providing Conforming Alternative Versions of web p
                that the Accessibility Guidelines Working Group deems sufficient for meeting this success criterion. However, it is
                not necessary to use these particular techniques. For information on using other techniques,
                see 
-               <a href="understanding-techniques"></a>, particularly the "Other Techniques" section.
+               <a href="understanding-techniques">Understanding Techniques</a>, particularly the "Other Techniques" section.
             </p>
 
             <ol>