Update xsd/netex_framework/netex_utility/netex_utility_xml.xsd

Co-authored-by: Stefan de Konink <stefan@konink.de>

Author: ue71603

xsd/netex_framework/netex_utility/netex_utility_xml.xsd

@@ -68,7 +68,7 @@ Rail transport, Roads and Road transport
 	<xsd:complexType name="TextType">
 		<xsd:simpleContent>
 			<xsd:extension base="xsd:string">
-				<xsd:attribute name="lang" type="xsd:string"/>
+				<xsd:attribute name="lang" type="xsd:language"/>
 				<xsd:attribute name="textIdType" type="xsd:string"/>
 			</xsd:extension>
 		</xsd:simpleContent>