Make the existence of --bes_results_url more prominent.

I guess that virtually everybody that uses a remote/centralized BES
wants to use a flag like this to gain access to the results. While
there, change the phrasing to imply that the list of command line
options is not exhaustive.

Closes #7557.

PiperOrigin-RevId: 235893666
diff --git a/site/docs/build-event-protocol.md b/site/docs/build-event-protocol.md
index 755600f..2088cdb 100644
--- a/site/docs/build-event-protocol.md
+++ b/site/docs/build-event-protocol.md
@@ -190,11 +190,12 @@
 
 ### Build Event Service Flags
 
-Bazel has several flags related to the [Build Event Service] protocol:
+Bazel has several flags related to the [Build Event Service] protocol, including:
 
 *  `--bes_backend`
 *  `--[no]bes_best_effort`
 *  `--[no]bes_lifecycle_events`
+*  `--bes_results_url`
 *  `--bes_timeout`
 *  `--project_id`