Fix a typo

Co-authored-by: Yusuke Endoh <mame@ruby-lang.org>

Author: kou

en/news/_posts/2024-10-28-redos-rexml-cve-2024-49761.md

@@ -10,7 +10,7 @@ lang: en
 
 There is a ReDoS vulnerability in REXML gem. This vulnerability has been assigned the CVE identifier [CVE-2024-49761](https://www.cve.org/CVERecord?id=CVE-2024-49761). We strongly recommend upgrading the REXML gem.
 
-This is not happen with Ruby 3.2 or later. Ruby 3.1 is the only affected maintained Ruby. Note that Ruby 3.1 will reach EOL on 2025-03.
+This does not happen with Ruby 3.2 or later. Ruby 3.1 is the only affected maintained Ruby. Note that Ruby 3.1 will reach EOL on 2025-03.
 
 ## Details