[ticket/17097] Fix PHP 8.2 deprecation warnings

PHPBB3-17097

phpBB/phpbb/event/data.php

@@ -44,21 +44,25 @@ class data extends Event implements \ArrayAccess
 		return array_intersect_key($this->data, array_flip($keys));
 	}
 
+	#[\ReturnTypeWillChange]
 	public function offsetExists($offset)
 	{
 		return isset($this->data[$offset]);
 	}
 
+	#[\ReturnTypeWillChange]
 	public function offsetGet($offset)
 	{
 		return isset($this->data[$offset]) ? $this->data[$offset] : null;
 	}
 
+	#[\ReturnTypeWillChange]
 	public function offsetSet($offset, $value)
 	{
 		$this->data[$offset] = $value;
 	}
 
+	#[\ReturnTypeWillChange]
 	public function offsetUnset($offset)
 	{
 		unset($this->data[$offset]);