fix typo in sample config

Author: fugerit79

src/test/resources/openapi-doc-config.xml

@@ -1,4 +1,4 @@
-<yaml-doc-config>
+<openapi-doc-config>
 
 	<openapi-catalog id="sample">
 		<openapi id="sample_yaml"
@@ -8,4 +8,4 @@
 			/>
 	</openapi-catalog>
 
-</yaml-doc-config>
+</openapi-doc-config>