fix typo

packages/app/src/components/Admin/Common/AdminNavigation.jsx

@@ -36,7 +36,7 @@ const AdminNavigation = (props) => {
       case 'user-groups':              return <><i className="mr-1 icon-fw icon-people"></i>{          t('user_group_management.user_group_management') }</>;
       case 'search':                   return <><i className="mr-1 icon-fw icon-magnifier"></i>{       t('full_text_search_management.full_text_search_management') }</>;
       case 'audit-log':                return <><i className="mr-1 icon-fw icon-feed"></i>{            t('audit_log_management.audit_log')}</>;
-      case 'plugins':                  return <><i className="mr-1 icon-fw icon-puzzle"></i>{           'Plugins Extention'}</>;
+      case 'plugins':                  return <><i className="mr-1 icon-fw icon-puzzle"></i>{           'Plugins Extension'}</>;
       case 'cloud':                    return <><i className="mr-1 icon-fw icon-share-alt"></i>{       t('cloud_setting_management.to_cloud_settings')} </>;
       default:                         return <><i className="mr-1 icon-fw icon-home"></i>{            t('wiki_management_home_page') }</>;
       /* eslint-enable no-multi-spaces, max-len */

packages/app/src/components/Admin/PluginsExtension/PluginInstallerForm.tsx

@@ -30,7 +30,7 @@ export const PluginInstallerForm = (): JSX.Element => {
     };
 
     try {
-      await apiv3Post('/plugins-extention', { pluginInstallerForm });
+      await apiv3Post('/plugins-extension', { pluginInstallerForm });
       toastSuccess('Plugin Install Successed!');
     }
     catch (err) {

packages/app/src/pages/admin/plugins.page.tsx

@@ -27,7 +27,7 @@ const AdminAppPage: NextPage<CommonProps> = (props) => {
   useIsMaintenanceMode(props.isMaintenanceMode);
   useCurrentUser(props.currentUser ?? null);
 
-  const title = 'Plugins Extention';
+  const title = 'Plugins Extension';
   const injectableContainers: Container<any>[] = [];
 
   if (isClient()) {

packages/app/src/server/routes/apiv3/index.js

@@ -104,7 +104,7 @@ module.exports = (crowi, app) => {
     userActivation.validateCompleteRegistration,
     userActivation.completeRegistrationAction(crowi));
 
-  router.use('/plugins-extention', require('./plugins-extention')(crowi));
+  router.use('/plugins-extension', require('./plugins-extension')(crowi));
 
   router.use('/user-ui-settings', require('./user-ui-settings')(crowi));