docs: update env help

Author: zimeg

cmd/env/env.go

@@ -36,11 +36,13 @@ func NewCommand(clients *shared.ClientFactory) *cobra.Command {
 		Aliases: []string{"var", "vars", "variable", "variables"},
 		Short:   "Add, remove, or list environment variables",
 		Long: strings.Join([]string{
-			"Add, remove, or list environment variables for apps deployed to Slack managed",
-			"infrastructure.",
+			"Add, remove, or list environment variables for the app.",
 			"",
-			"This command is supported for apps deployed to Slack managed infrastructure but",
-			"other apps can attempt to run the command with the --force flag.",
+			"Commands that run in the context of a project source environment variables from",
+			"the \".env\" file. This includes the \"run\" command.",
+			"",
+			"The \"deploy\" command gathers environment variables from the \".env\" file as well",
+			"unless the app is using ROSI features.",
 			"",
 			`Explore more: {{LinkText "https://docs.slack.dev/tools/slack-cli/guides/using-environment-variables-with-the-slack-cli"}}`,
 		}, "\n"),