change a-tag to div-tag

src/client/js/components/Admin/SlackIntegration/CustomBotWithoutProxySettings.jsx

@@ -56,7 +56,7 @@ const CustomBotWithoutProxySettings = (props) => {
           <div className="row">
             <h5 className="card-title font-weight-bold mt-3 ml-4 col">GROWI App</h5>
             <div className="pull-right mt-3 mr-3">
-              <a className="icon-fw fa fa-repeat fa-2x" onClick={fetchSlackWorkSpaceName}></a>
+              <div className="icon-fw fa fa-repeat fa-2x" onClick={fetchSlackWorkSpaceName}></div>
             </div>
           </div>
           <div className="card-body p-4 mb-5 text-center"> { slackWSNameInWithoutProxy && <a className="btn btn-primary">{ slackWSNameInWithoutProxy }</a> }