Add ignore: Parameter xfrocks#2 $indexName of method XF\Db\Schema\AbstractDdl::addUniqueKey() expects null

Author: luutruong

PHPStan/phpstan.neon

@@ -26,6 +26,7 @@ parameters:
 		- '#::(getPurchaseFromRequest|getPurchaseFromExtraData)\(\) should be covariant with return type \(XF\\Purchasable\\Purchase\)#'
 		- '#Access to an undefined property XF\\Api\\Result\\EntityResult::.+#'
 		- '#Anonymous function should have native return typehint "void".#'
+		- '#Parameter \#2 \$indexName of method XF\\Db\\Schema\\AbstractDdl::addUniqueKey\(\) expects null#'
 
 	reportUnmatchedIgnoredErrors: false