Update .env.example

Author: mageroni

.env.example

@@ -11,5 +11,5 @@ LANGUAGE_API_KEY=
 APPLICATIONINSIGHTS_CONNECTION_STRING=
 DATABASE_CONNECTION_STRING=
 
-# Set a value if you want to check whether a Copilot license has been assigned to a user before opening the survey issue. Leave empty if you don't.
-VALIDATE_SEAT_ASSIGNMENT=true
+# Set to "YES" if you want to check whether a Copilot license has been assigned to a user before opening the survey issue. Any other value if you don't.
+VALIDATE_SEAT_ASSIGNMENT=YES