Added deepwiki link, now Deepwiki will autorefresh the content on DeepWiki, earlier we had to put a manual request to refresh. (#4917)

Author: ajeetgill

README.md

@@ -12,7 +12,10 @@ FOAM3 is the active version of FOAM.
 
 The FOAM1 [website](https://foam-framework.github.io/foam/) still contains many useful demos and videos (but some links may be broken).
 
-Ask questions and get help on the [FOAM Discussion Group](https://groups.google.com/g/foam-framework-discuss).
+Ask questions and get help on the [FOAM Discussion Group](https://groups.google.com/g/foam-framework-discuss). Or DeepWiki. 
+
+
+[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/kgrgreer/foam3)
 
 <!--
 [![Build Status](https://travis-ci.org/foam-framework/foam3.svg?branch=master)](https://travis-ci.org/foam-framework/foam3) -->