chore: Update phpstan.neon ignore constant error

Author: j7-dev

phpstan.neon

@@ -3,10 +3,12 @@ parameters:
 	paths:
 		- plugin.php
 		- inc/
+	ignoreErrors:
+		- '#Constant .* not found#'
 	excludePaths:
 		- js/*
 		- vendor/*
 		- node_modules/*
 	bootstrapFiles:
 		- vendor/php-stubs/wordpress-stubs/wordpress-stubs.php
-		- vendor/php-stubs/woocommerce-stubs/woocommerce-stubs.php
+		- vendor/php-stubs/woocommerce-stubs/woocommerce-stubs.php