Fixed some text in membership emails

templates/mail/organisation-membership-accepted.html.twig

@@ -1,5 +1,5 @@
 {% block subject %}
-    {{site.title}} - organisation registration approved
+    {{site.title}} - join organisation request accepted
 {% endblock %}
 
 {% block body %}

templates/mail/organisation-membership-rejected.html.twig

@@ -1,5 +1,5 @@
 {% block subject %}
-    {{site.title}} - organisation registration rejected
+    {{site.title}} - join organisation request rejected
 {% endblock %}
 
 {% block body %}

templates/mail/organisation-membership-request.html.twig

@@ -20,7 +20,7 @@
     </dl>
 </p>
 <p>
-    You may verify or reject this request via the control dashboard  (<a href="{{site.uri.public}}/organisations/o/{{organisation.slug}}">{{site.uri.public}}/organisations/o/{{organisation.slug}}</a>).
+    You may accept or reject this request via the control dashboard  (<a href="{{site.uri.public}}/organisations/o/{{organisation.slug}}">{{site.uri.public}}/organisations/o/{{organisation.slug}}</a>).
 </p>
 <p>
     To accept this request immediately you may do so by visiting: <a href="{{site.uri.public}}/organisations/members/accept?token={{token}}">{{site.uri.public}}/organisations/members/accept?token={{token}}</a>.