Add Sergej and Cornelius

bug-bounty-hof/client.yml

@@ -52,6 +52,8 @@ names:
 - name: Hafiizh
   date: 2021-10-26
   url: https://www.linkedin.com/in/hafiizh-7aa6bb31/
+- name: Cornelius Aschermann, Sergej Schumilo
+  date: 2021-09-29
 - name: Ademar Nowasky Junior
   date: 2021-09-28
   twitter: "@nowaskyjr"