Add Jean Abed to credits

From zaproxy/zap-api-python#4.

Author: thc202

src/help/zaphelp/contents/credits.html

@@ -26,6 +26,7 @@ <H2>ZAP Extended Team</H2>
 <table>
 <tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>70pointer</td></tr>
 <tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Mostafa AbdelMoez</td></tr>
+<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Jean Abed</td></tr>
 <tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Amro Alolaqi</td></tr>
 <tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Mário Areias</td></tr>
 <tr><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Matt Austin (@mattaustin)</td></tr>