Update README.md

Author: aduguid

README.md

@@ -19,6 +19,7 @@ The following examples are provided to query both the database and report server
 - <a href="#externaltools">External Tools</a>
 - <a href="#software">Software</a>
 - <a href="#filelist">File List</a>
+- <a href="#externaltools">External Tools</a>
 </details>
 
 <a id="user-content-title" class="anchor" href="#reports" aria-hidden="true"> </a>