GH-11964: In ext/date/php_date.stub.php, DateRangeError extends itself

According to the RFC[1] it's supposed to extend DateError.

[1] https://wiki.php.net/rfc/datetime-exceptions

Author: ndossche

ext/date/php_date.stub.php

@@ -766,7 +766,7 @@ class DateObjectError extends DateError
 /**
  * @strict-properties
  */
-class DateRangeError extends DateRangeError
+class DateRangeError extends DateError
 {
 }