add target _blank

Author: JoeChenJ

src/intl/en/common.json

@@ -30,7 +30,7 @@
   "content-standardization": "Content standardization",
   "contributing": "Contributing",
   "contributors": "Contributors",
-  "contributors-thanks": "Everyone who has <a href=\"/contributing\">contributed</a> to this page – thank you!",
+  "contributors-thanks": "Everyone who has <a href=\"/contributing\" target=\"_blank\">contributed</a> to this page – thank you!",
   "cookie-policy": "Cookie policy",
   "copied": "Copied",
   "copy": "Copy",