Add pip command for update

Adds the pip comman for updating mvt. I think this would be helpfull for novice users as it already has been asked here: https://github.com/mvt-project/mvt/discussions/261
Also I sometimes forget the command too ;)

mvt/common/logo.py

@@ -19,7 +19,7 @@ def check_updates() -> None:
     else:
         if latest_version:
             rich_print(f"\t\t[bold]Version {latest_version} is available! "
-                       "Upgrade mvt![/bold]")
+                       "Upgrade mvt with pip3 install -U mvt[/bold]")
 
     # Then we check for indicators files updates.
     ioc_updates = IndicatorsUpdates()