Apply suggestions from code review

Co-authored-by: SamyOubouaziz <[email protected]>

Author: jcirinosclwy

pages/account/how-to/change-console-appearance.mdx

@@ -26,7 +26,7 @@ You can choose the color scheme of the [Scaleway console](/account/concepts/#con
     * Light
     * Dark
     * Darker
-    * System.
+    * System
 
 <Message type="note">
   Your selection is saved automatically once you have chosen a color scheme.