Add period to alt-text description

Author: denrea

docs/deployment/how-to-install-prerequisites-with-a-clickonce-application.md

@@ -42,7 +42,7 @@ All ClickOnce applications require that the correct version of the .NET Framewor
 
 3. Click the **Prerequisites** button to open the **Prerequisites** dialog box.
 
-   ![Screenshot of Prerequisites dialog box in Visual Studio](media/prerequisites-dialog-box.png)
+   ![Screenshot of Prerequisites dialog box in Visual Studio.](media/prerequisites-dialog-box.png)
 
 4. In the **Prerequisites** dialog box, make sure that the **Create setup program to install prerequisite components** check box is selected.
 
@@ -69,4 +69,4 @@ All ClickOnce applications require that the correct version of the .NET Framewor
 
 ## Related content
 - [Publish ClickOnce applications](../deployment/publishing-clickonce-applications.md)
-- [How to: Publish a ClickOnce application using the Publish Wizard](../deployment/how-to-publish-a-clickonce-application-using-the-publish-wizard.md)
+- [How to: Publish a ClickOnce application using the Publish Wizard](../deployment/how-to-publish-a-clickonce-application-using-the-publish-wizard.md)