Change binary name from main to gitea

conf/app.ini

@@ -120,7 +120,7 @@ MINIMUM_KEY_SIZE_CHECK = false
 OFFLINE_MODE = false
 DISABLE_ROUTER_LOG = false
 ; Generate steps:
-; $ ./main cert -ca=true -duration=8760h0m0s -host=myhost.example.com
+; $ ./gitea cert -ca=true -duration=8760h0m0s -host=myhost.example.com
 ;
 ; Or from a .pfx file exported from the Windows certificate store (do
 ; not forget to export the private key):