Add fixed rubygems version 2.7.6.2 in Workarounds section.

nagachika · nagachika · commit 607669497289 · 2019-03-13T19:33:32.000+09:00
diff --git a/en/news/_posts/2019-03-05-multiple-vulnerabilities-in-rubygems.md b/en/news/_posts/2019-03-05-multiple-vulnerabilities-in-rubygems.md
@@ -33,7 +33,7 @@ It is strongly recommended for Ruby users to take one of the following workaroun
 
 ## Workarounds
 
-RubyGems 2.7.9/3.0.3 or later includes the fix for the vulnerabilities, so upgrade RubyGems to the latest version.
+RubyGems 2.7.6.2/2.7.9/3.0.3 or later includes the fix for the vulnerabilities, so upgrade RubyGems to the latest version.
 
 ```
 gem update --system
