typo fix

packages/app/src/server/service/slack-command-handler/search.js

@@ -365,7 +365,7 @@ module.exports = (crowi) => {
         user: body.user_id,
         text: `No page found with "${keywords}"`,
         blocks: [
-          markdownSectionBlock(`*No page that matches your keyword(s) "${keywords}".*`),
+          markdownSectionBlock(`*No page matches your keyword(s) "${keywords}".*`),
           markdownSectionBlock(':mag: *Help: Searching*'),
           divider(),
           markdownSectionBlock('`word1` `word2` (divide with space) \n Search pages that include both word1, word2 in the title or body'),