Updating delete confirmation message (radius-project#7049)

# Description

Ran into this message while testing something else.
Updated the confirmation message of app deletion. Not sure if this
should be the case.

## Type of change
- This pull request is a minor refactor, code cleanup, test improvement,
or other maintenance task and doesn't change the functionality of Radius
(issue link optional).
Fixes: #issue_number

Signed-off-by: ytimocin <ytimocin@microsoft.com>

pkg/cli/cmd/app/delete/delete.go

@@ -33,7 +33,7 @@ import (
 )
 
 const (
-	deleteConfirmation = "Are you sure you want to delete application '%v' from '%v'?"
+	deleteConfirmation = "Are you sure you want to delete application '%v' from environment '%v'?"
 	bicepWarning       = "'%v' is a Bicep filename or path and not the name of a Radius Application. Specify the name of a valid application and try again"
 )