Fix typo in CVE-2011-4838.yml notes

Author: jasnow

rubies/jruby/CVE-2011-4838.yml

@@ -23,4 +23,4 @@ related:
     - https://exchange.xforce.ibmcloud.com/vulnerabilities/72019
     - https://github.com/advisories/GHSA-cgqc-fqxr-q6r6
 notes: |
-  - CVE-2011-4815 is the same issue but Ruby.
+  - CVE-2011-4815 is the same issue but for Ruby.