blog: add attribution (#3385)

Signed-off-by: Michael Dawson <[email protected]>

Co-authored-by: Nick Schonning <[email protected]>

Author: mhdawson

locale/en/blog/vulnerability/september-2020-security-releases.md

@@ -40,6 +40,8 @@ Impacts:
 * All versions of the 12.x release line
 * All versions of the 14.x release line before 14.9.0
 
+Thank you Xiaoyi Shi who works at Tencent for reporting this vulnerability.
+
 ## Downloads and release details
 
 * [Node.js v10.22.1 (LTS)](https://nodejs.org/en/blog/release/v10.22.1/)