Contact email in case of issue

Signed-off-by: Bruno Khélifi <khelifi@in2p3.fr>

CoC.html

@@ -73,6 +73,7 @@
 <main>
     <div class="container">
         <h1>Gammapy Community Code of Conduct</h1>
+        <br><br>
 
         <p>
             <strong>Gammapy is committed to fostering an inclusive community.</strong>  
@@ -114,6 +115,11 @@ <h1>Gammapy Community Code of Conduct</h1>
             social media, conferences, meetings, associated social events, and one-to-one interactions. This Code of
             Conduct have been mostly re-used from the <a href="https://www.astropy.org/code_of_conduct.html">Astropy code of conduct</a>.
         </p>
+
+        <br><hr><br>
+        <p> In order to report any information or issue, please contact the Gammapy Coordination Committee using its
+        generic <a href="mailto:gammapy-coordination-l@in2p3.fr">email</a>.
+        </p>
     </div>
 </main>