Update failure

Author: Takahiro-Yoko

modules/exploits/linux/http/selenium_greed_chrome_rce_cve_2022_28108.rb

@@ -128,7 +128,7 @@ def exploit
       'headers' => { 'Content-Type' => 'text/plain' },
       'data' => body
     })
-    fail_with(Failure::Unreachable, 'Connection failed.') unless res
+    fail_with(Failure::Unknown, 'Unexpected server reply.') unless res
   end
 
 end