Update support email help text (#3172)

* Update legal_and_support_settings.jsx

* Update admin.support.emailHelp string

webapp/components/admin_console/legal_and_support_settings.jsx

@@ -154,7 +154,7 @@ export default class LegalAndSupportSettings extends AdminSettings {
                     helpText={
                         <FormattedMessage
                             id='admin.support.emailHelp'
-                            defaultMessage='Email shown during tutorial for end users to ask support questions.'
+                            defaultMessage='Email address displayed on email notifications and during tutorial for end users to ask support questions.'
                         />
                     }
                     value={this.state.supportEmail}
@@ -163,4 +163,4 @@ export default class LegalAndSupportSettings extends AdminSettings {
             </SettingsGroup>
         );
     }
-}
+}