Associate room alias warning with public option in settings (#7430)

* add describedby to styledradiogroup description

Signed-off-by: Kerry Archibald <kerrya@element.io>

* alias warning in description

Signed-off-by: Kerry Archibald <kerrya@element.io>

* lint

Signed-off-by: Kerry Archibald <kerrya@element.io>

* update snapshot

Signed-off-by: Kerry Archibald <kerrya@element.io>

src/components/views/settings/tabs/room/SecurityRoomSettingsTab.tsx

@@ -270,14 +270,13 @@ export default class SecurityRoomSettingsTab extends React.Component<IProps, ISt
         });
 
         return <SettingsFieldset legend={_t("Access")} description={description}>
-            { aliasWarning }
-
             <JoinRuleSettings
                 room={room}
                 beforeChange={this.onBeforeJoinRuleChange}
                 onError={this.onJoinRuleChangeError}
                 closeSettingsFn={this.props.closeSettingsFn}
                 promptUpgrade={true}
+                aliasWarning={aliasWarning}
             />
         </SettingsFieldset>;
     }