manual: Update counters, add proper chapter for counters

Change-Id: If499ba8f8e26d340e79a42be3fb490e912d507cc
diff --git a/doc/manuals/osmogbproxy-usermanual.adoc b/doc/manuals/osmogbproxy-usermanual.adoc
index 193b6a4..835b4ed 100644
--- a/doc/manuals/osmogbproxy-usermanual.adoc
+++ b/doc/manuals/osmogbproxy-usermanual.adoc
@@ -31,7 +31,7 @@
 
 include::./common/chapters/control_if.adoc[]
 
-include::{srcdir}/chapters/counters_generated.adoc[]
+include::{srcdir}/chapters/counters.adoc[]
 
 include::./common/chapters/vty_cpu_sched.adoc[]