Updating timeline tooltip and icon

app/assets/javascripts/notes/components/timeline_toggle.vue

@@ -7,8 +7,8 @@ import { COMMENTS_ONLY_FILTER_VALUE, DESC } from '../constants';
 import notesEventHub from '../event_hub';
 import { trackToggleTimelineView } from '../utils';
 
-export const timelineEnabledTooltip = s__('Timeline|Turn timeline view off');
-export const timelineDisabledTooltip = s__('Timeline|Turn timeline view on');
+export const timelineEnabledTooltip = s__('Timeline|Turn recent updates view off');
+export const timelineDisabledTooltip = s__('Timeline|Turn recent updates view on');
 
 export default {
   components: {
@@ -49,7 +49,7 @@ export default {
   <gl-button
     v-gl-tooltip
     v-track-event="trackToggleTimelineView(timelineEnabled)"
-    icon="comments"
+    icon="history"
     :selected="timelineEnabled"
     :title="tooltip"
     :aria-label="tooltip"

doc/operations/incident_management/incidents.md

@@ -200,10 +200,10 @@ field populated.
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/227836) in GitLab 13.5.
 
 To quickly see the latest updates on an incident, click
-**{comments}** **Turn timeline view on** in the comment bar to display comments
+**{comments}** **Turn recent updates view on** in the comment bar to display comments
 un-threaded and ordered chronologically, newest to oldest:
 
-![Timeline view toggle](img/timeline_view_toggle_v13_5.png)
+![Timeline view toggle](img/timeline_view_toggle_v14_10.png)
 
 ### Service Level Agreement countdown timer **(PREMIUM)**