Update Create_your_own_application_for_CamiTK.md

docs/Advanced Topics/Create_your_own_application_for_CamiTK.md

-<img src="../assets/Application.png" size="150px">Application</img>
+<img src="../assets/Application.png" width="50%">Application</img>
 
 Creating your own CamiTK application remain useless in 95% of the use
 cases, as the already provided [CamiTK IMP