modtools: fix typo

src/templates/moderator_tools_modal.html

@@ -21,7 +21,7 @@
                     <div class="tab-pane tab-pane--columns active" id="roles-tabpanel" role="tabpanel" aria-labelledby="roles-tab">
                         <form class="converse-form query-role">
                             <p class="helptext pb-3">
-{{{o.__("Roles can assigned to users to grant or deny them certain abilities in a multi-user chat. They're assigned either explicitly or implicitly as part of an affiliation. A role that's not due to an affiliation, is only valid for the duration of the user's session.")}}}
+{{{o.__("Roles are assigned to users to grant or deny them certain abilities in a multi-user chat. They're assigned either explicitly or implicitly as part of an affiliation. A role that's not due to an affiliation, is only valid for the duration of the user's session.")}}}
                             </p>
                             <div class="form-group">
                                 <label for="role">