Fix typo

Author: srenon

etc/adminhtml/system.xml

@@ -21,7 +21,7 @@
                 <comment>
                     <![CDATA[
                     <strong>Copyright © 2018 <a href="http://bit.ly/MPEXSMTP" target="_blank">www.magepal.com</a> / <a href="mailto:[email protected]">[email protected]</a></strong><br />
-                    Thanks for choosing MagePal Extensions. Trusted by 1000s of developers worldwide.<br/><br/>
+                    Discover other must have extensions at <a href="https://www.magepal.com" target="_blank">www.magepal.com</a>. Thanks for choosing MagePal Extensions.<br/><br/>
                     <hr style="border-top: 1px solid #e3e3e3" />
                   ]]>
                 </comment>