Improve cve-2024-43398 details

Author: riseshia

en/news/_posts/2024-08-22-dos-rexml-cve-2024-43398.md

@@ -12,7 +12,7 @@ There is a DoS vulnerability in REXML gem. This vulnerability has been assigned
 
 ## Details
 
-When parsing an XML that has many deep elements that have same local name attributes.
+When parsing an XML that has many deep elements that have same local name attributes, REXML gem may take long time.
 
 It's only affected with the tree parser API. If you're using `REXML::Document.new` to parse an XML, you may be affected.