clarify why we are referencing sli in rule docs

docs/en/observability/monitor-status-alert.asciidoc

@@ -234,8 +234,11 @@ image::images/monitor-status-alert-recovery.png[Default recovery message for mon
 If you are currently using the Uptime monitor status with a monitor created with Elastic Synthetics,
 you should migrate the Uptime monitor status rule to:
 
-* The *Synthetics monitor rule* for <<migrate-monitor-rule-synthetics-rule,synthetic monitor _status_ checks>>.
-* The *Synthetics availability SLI* for <<migrate-monitor-rule-synthetics-sli,synthetic monitor _availability_ checks>>.
+* If you were using the Uptime rule for *synthetic monitor _status_ checks*,
+  you can recreate similar functionality using the <<migrate-monitor-rule-synthetics-rule,Synthetics monitor rule>>.
+* If you were using the Uptime rule for *synthetic monitor _availability_ checks*,
+  there is no equivalent in the Synthetics monitor rule. Instead, you can use the
+  <<migrate-monitor-rule-synthetics-sli,Synthetics availability SLI>> to create similar functionality.
 
 [discrete]
 [[migrate-monitor-rule-synthetics-rule]]