Fix conformance class URIs (#1967)

* Fix conformance class URIs

Fix them to match table 2 of https://docs.ogc.org/is/17-069r4/17-069r4.html (
http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/oas30)
and
https://github.com/opengeospatial/ogcapi-features/blob/master/extensions/schemas/standard/clause_2_conformance.adoc
(http://www.opengis.net/spec/{standard}/{m_n}/conf/core-roles-features)

* Update itemtypes.py

---------

Co-authored-by: Tom Kralidis <tomkralidis@gmail.com>

Author: rouault

pygeoapi/api/itemtypes.py

@@ -80,15 +80,15 @@
 
 CONFORMANCE_CLASSES_FEATURES = [
     'http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/core',
-    'http://www.opengis.net/spec/ogcapi-features-1/1.0/req/oas30',
+    'http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/oas30',
     'http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/html',
     'http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/geojson',
     'http://www.opengis.net/spec/ogcapi-features-2/1.0/conf/crs',
     'http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/queryables',
     'http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/queryables-query-parameters',  # noqa
     'http://www.opengis.net/spec/ogcapi-features-4/1.0/conf/create-replace-delete',  # noqa
     'http://www.opengis.net/spec/ogcapi-features-5/1.0/conf/schemas',
-    'http://www.opengis.net/spec/ogcapi-features-5/1.0/req/core-roles-features'
+    'http://www.opengis.net/spec/ogcapi-features-5/1.0/conf/core-roles-features'  # noqa
 ]
 
 CONFORMANCE_CLASSES_RECORDS = [