Update index.md

Signed-off-by: Justin Kenyon <kenyonj@github.com>

Author: kenyonj

topics/chrome/index.md

@@ -1,6 +1,6 @@
 ---
 aliases: google-chrome
-related: firefox,safari,edge,opera,chromium,browser,chrome-extension
+related: firefox, safari, edge, opera, chromium, browser, chrome-extension
 created_by: Google
 display_name: Chrome
 github_url: https://github.com/googlechrome