Update SECURITY.md

SECURITY.md

@@ -9,9 +9,9 @@
 
 ## Reporting Security Issues
 
-If you believe you have found a security vulnerability in any GROWI related repository, **please do not report security vulnerabilities through public GitHub issues.**
+**please do not report security vulnerabilities through public GitHub issues.**
 
-Instead, please report it to us using one of the methods described below.
+If you believe you have found a security vulnerability in any GROWI related repository, please report it to us using one of the methods described below.
 
   * [Join our Slack team](https://growi-slackin.weseek.co.jp/) and send DM to `@yuki` who is the lead developer
   * Report to JPCERT/CC ([en](https://www.jpcert.or.jp/english/ir/form.html)/[ja](https://www.jpcert.or.jp/form/))