Added link to prism-liquibase Bash language extension. (#2191)

In an effort to make some of our documentation easier to parse, Liquibase has published an extension to the Bash language to offer tokenization of Liquibase CLI commands.

Author: tabuckner

index.html

@@ -252,6 +252,7 @@ <h1>Third-party language definitions</h1>
 
 	<ul>
 		<li><a href="https://github.com/SassDoc/prism-scss-sassdoc">SassDoc Sass/Scss comments</a></li>
+		<li><a href="https://github.com/Liquibase/prism-liquibase">Liquibase CLI Bash language extension</a></li>
 	</ul>
 </section>