fix test that checks restapi version, now 9.15.2

Author: reekitconcept

backend/tests/services/system/test_system_get.py

@@ -47,7 +47,7 @@ def test_keys(self, key, type_):
         (
             ("cmf_version", "3.7"),
             ("debug_mode", "No"),
-            ("plone_restapi_version", "9.15.1"),
+            ("plone_restapi_version", "9.15.2"),
             ("plone_version", "6.1.2"),
             ("upgrade", False),
         ),