For #16076 - Update metrics.md documentation

A link for the "share_image" data review is to be added after review.

docs/metrics.md

@@ -80,7 +80,7 @@ The following metrics are added to the ping:
 | collections.tab_restored |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user restored a tab from collection tab list  |[1](https://github.com/mozilla-mobile/fenix/pull/3935), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)||2021-04-01 |1, 2 |
 | collections.tab_select_opened |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user opened the select tabs screen (the first step of the collection creation flow)  |[1](https://github.com/mozilla-mobile/fenix/pull/3935), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)||2021-04-01 |1, 2 |
 | collections.tabs_added |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user saved a list of tabs to an existing collection  |[1](https://github.com/mozilla-mobile/fenix/pull/3935), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)|<ul><li>tabs_open: The number of tabs open in the current session</li><li>tabs_selected: The number of tabs added to the collection</li></ul>|2021-04-01 |1, 2 |
-| context_menu.item_tapped |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user tapped an item in the browsers context menu  |[1](https://github.com/mozilla-mobile/fenix/pull/1344#issuecomment-479285010), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)|<ul><li>named: The name of the item that was tapped. Available items are:  ``` open_in_new_tab, open_in_private_tab, open_image_in_new_tab, save_image, share_link, copy_link, copy_image_location ``` </li></ul>|2021-04-01 |2 |
+| context_menu.item_tapped |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user tapped an item in the browsers context menu  |[1](https://github.com/mozilla-mobile/fenix/pull/1344#issuecomment-479285010), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)|<ul><li>named: The name of the item that was tapped. Available items are:  ``` open_in_new_tab, open_in_private_tab, open_image_in_new_tab, save_image, share_link, copy_link, copy_image_location, share_image ``` </li></ul>|2021-04-01 |2 |
 | contextual_hint.tracking_protection.dismiss |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |The enhanced tracking protection contextual hint was dismissed by pressing the close button  |[1](https://github.com/mozilla-mobile/fenix/pull/11923), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)||2021-04-01 |2 |
 | contextual_hint.tracking_protection.display |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |The enhanced tracking protection contextual hint was displayed.  |[1](https://github.com/mozilla-mobile/fenix/pull/11923), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)||2021-04-01 |2 |
 | contextual_hint.tracking_protection.inside_tap |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |The user tapped inside of the etp contextual hint (which brings up the etp panel for this site).  |[1](https://github.com/mozilla-mobile/fenix/pull/11923), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)||2021-04-01 |2 |