Update APIs to 8.8.0

docs/reference.asciidoc

@@ -4119,6 +4119,16 @@ Forces the execution of a stored watch.
 client.watcher.executeWatch(...)
 ----
 
+[discrete]
+==== get_settings
+Retrieve settings for the watcher system index
+
+{ref}/watcher-api-get-settings.html[Endpoint documentation]
+[source,ts]
+----
+client.watcher.getSettings(...)
+----
+
 [discrete]
 ==== get_watch
 Retrieves a watch by its ID.
@@ -4179,6 +4189,16 @@ Stops Watcher if it is running.
 client.watcher.stop(...)
 ----
 
+[discrete]
+==== update_settings
+Update settings for the watcher system index
+
+{ref}/watcher-api-update-settings.html[Endpoint documentation]
+[source,ts]
+----
+client.watcher.updateSettings(...)
+----
+
 [discrete]
 === xpack
 [discrete]