[Docs/Reporting] Have the docs about granular timeout match Cloud docs

docs/settings/reporting-settings.asciidoc

@@ -126,16 +126,22 @@ control the capturing process.
 [cols="2*<"]
 |===
 | `xpack.reporting.capture.timeouts.openUrl`
-  | How long to allow the Reporting browser to wait for the initial data of the
-  {kib} page to load. Defaults to `30000` (30 seconds).
+  | How long to allow the Reporting browser to wait for the "Loading..." screen
+  to dismiss, and initial data of the Kibana page to load.  If the time is
+  exceeded, a screenshot of the page is captured and the report shows warnings.
+  Defaults to `30000` (30 seconds).
 
 | `xpack.reporting.capture.timeouts.waitForElements`
-  | How long to allow the Reporting browser to wait for the visualization panels to
-  load on the {kib} page. Defaults to `30000` (30 seconds).
+  | How long to allow the Reporting browser to wait for the visualization
+  panels to load on the Kibana page. If the time is exceeded, a screenshot of
+  the page is captured and the report shows warnings. Defaults to `30000` (30
+  seconds).
 
 | `xpack.reporting.capture.timeouts.renderComplete`
   | How long to allow the Reporting browser to wait for each visualization to
-  signal that it is done renderings. Defaults to `30000` (30 seconds).
+  complete fetching and rendering the data. If the time is exceeded, a
+  screenshot of the page is captured and the report shows warnings. Defaults to
+  `30000` (30 seconds).
 
 |===