MC-40815: Improve diagrams in the install Upgrade Compatibility Tool page (#8653)

* Modified diagram for tool

* Modified images and diagrams for upgrade compatibility tool ALPHA

* Modified images and diagrams size

* Added header for use case

* modified size for diagram

* removed unnnecesary diagram

Author: danidelcar

src/upgrade-compatibility-tool/img/audience-uct-v2.png

@@ -14,7 +14,7 @@ The Upgrade Compatibility Tool ALPHA is a command line tool that checks a Magent
 
 The following diagram shows the expected workflow when running the Upgrade Compatibility Tool:
 
-![Upgrade Compatibility Tool Diagram](img/mvp-diagram-v2.png)
+![Upgrade Compatibility Tool Diagram](img/mvp-diagram-v3.png){:height="80%" width="80%"}
 
 ## Who is the Upgrade Compatibility Tool for?
 
@@ -28,9 +28,9 @@ The following use case describes the typical process for a Magento partner to up
 1. The Software Engineer runs the Upgrade Compatibility Tool one more time with a Magento pre-release to ensure there are no new issues and that their code changes fixed the problems found during the beta phase.
 1. Everything check’s out and the Software Engineer pushes the code to a staging environment where regression tests confirm all tests are green, which allows them to release the latest Magento version to production the same day that the Magento pre-release is released.
 
-![Upgrade Compatibility Tool audience](img/audience-uct.png)
+![Upgrade Compatibility Tool audience](img/audience-uct-v2.png){:height="80%" width="80%"}
 
-### Contact Upgrade Compatibility Tool
+## Contact Upgrade Compatibility Tool
 
 To connect with the Upgrade Compatibility Tool team: