docs: better wording

cli/app/secret.go

@@ -165,7 +165,7 @@ var AppSecretInsertCommand = &cobra.Command{
 Arbitrary secret insertion is not supported. Secrets that are inserted must
 match those configured in the recipe beforehand.
 
-This can be useful when you want to manually generate secrets for an app
+This command can be useful when you want to manually generate secrets for an app
 environment. Typically, you can let Abra generate them for you on app creation
 (see "abra app new --secrets/-S" for more).`),
 	Example: i18n.G(`  # insert regular secret