Merge pull request #507 from thc202/update-credits

Add Patrick Double to credits

Author: psiinon

addOns/help/src/main/javahelp/contents/credits.html

@@ -63,6 +63,7 @@ <H2>ZAP Extended Team</H2>
 <tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Chris Dailey (<a href="https://github.com/dailz-c">@dailz-c</a>)</td></tr>
 <tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Karl Dalley (<a href="https://github.com/gnirlos">@gnirlos</a>)</td></tr>
 <tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Anamika Das (<a href="https://twitter.com/AnamikaD">@AnamikaD</a>)</td></tr>
+<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Patrick Double (<a href="https://github.com/double16">@double16</a>)</td></tr>
 
 <tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Mike Emery - Portcullis Security</td></tr>