Typo fix, alt-text compliance

Author: denrea

articles/sentinel/get-visibility.md

@@ -20,7 +20,7 @@ After connecting your data sources to Microsoft Sentinel, use the **Overview** p
 
 ## Prerequisites
 
-- Make sure that you have reader access to Micrososft Sentinel resources. For more information, see [Roles and permissions in Microsoft Sentinel](roles.md).
+- Make sure that you have reader access to Microsoft Sentinel resources. For more information, see [Roles and permissions in Microsoft Sentinel](roles.md).
 
 ## Access the Overview page
 

articles/sentinel/monitor-your-data.md

@@ -144,7 +144,7 @@ We recommend that you install the appropriate solution from the **Content hub**
 
 For example, install the Palo Alto firewall solution for Microsoft Sentinel to add the Palo Alto workbooks. The workbooks analyze your firewall traffic, providing you with correlations between your firewall data and threat events, and highlight suspicious events across entities.
 
-:::image type="content" source="media/qs-get-visibility/palo-alto-week-query.png" alt-text="Screenshot of the Palo Alto workbook":::
+:::image type="content" source="media/qs-get-visibility/palo-alto-week-query.png" alt-text="Screenshot of the Palo Alto workbook.":::
 
 ### Create different workbooks for different uses