Add missing asterisk on summit form for slug field

Signed-off-by: Tomás Castillo <[email protected]>

src/components/forms/summit-form.js

@@ -389,7 +389,7 @@ class SummitForm extends React.Component {
                         />
                     </div>
                     <div className="col-md-4">
-                        <label> {T.translate("edit_summit.slug")}</label>
+                        <label> {T.translate("edit_summit.slug")} *</label>
                         <Input
                             className="form-control"
                             error={this.hasErrors('slug')}