serverlog: update number of served bytes in test (Bug 1501686) r=gps

I believe this is a side effect of some of the other
changes landed today.

Differential Revision: https://phabricator.services.mozilla.com/D10971

--HG--
extra : moz-landing-system : lando

hgext/serverlog/tests/test-http-syslog.t

@@ -30,7 +30,7 @@ Mercurial wire protocol commands and HTTP commands logged to syslog
   * hgweb: * BEGIN_PROTOCOL getbundle (glob)
   * hgweb: * END_REQUEST 82 * * (glob)
   * hgweb: * BEGIN_REQUEST /mozilla-central * /mozilla-central (glob)
-  * hgweb: * END_REQUEST 3858 * * (glob)
+  * hgweb: * END_REQUEST 3822 * * (glob)
   * hgweb: * BEGIN_REQUEST /mozilla-central * /mozilla-central/json-repoinfo (glob)
   * hgweb: * END_REQUEST 23 * * (glob)