Update threat analytics doc and dashboard images

Added a new screenshot for the Add filters option in the threat analytics documentation and updated alt text for clarity. Refreshed dashboard, landing page, and overview images to reflect the latest UI.

Author: poliveria

defender-xdr/threat-analytics.md

@@ -109,9 +109,11 @@ Categories are presented at the top of the threat analytics page. Counters show
 
 To add report filter types in your dashboard, select **Filters**, choose from the list, and select **Add**.
 
+:::image type="content" source="/defender/media/threat-analytics/ta-taglist-mtp.png" alt-text="Screenshot of the threat analytics Add filters option." lightbox="/defender/media/threat-analytics/ta-taglist-mtp.png":::
+
 To set the types of reports you want in the list based on the available filters, select a filter type (for example, **Threat tags**), choose from the list, and select **Apply**.
 
-:::image type="content" source="/defender/media/threat-analytics/ta-threattag-filters-mtp.png" alt-text="Screenshot of the Filters list." lightbox="/defender/media/threat-analytics/ta-threattag-filters-mtp.png":::
+:::image type="content" source="/defender/media/threat-analytics/ta-threattag-filters-mtp.png" alt-text="Screenshot of the Filters list in Threat tags." lightbox="/defender/media/threat-analytics/ta-threattag-filters-mtp.png":::
 
 ## View a threat analytics report