Updated docs

Backend-libXML/main.py

@@ -17,8 +17,8 @@ def process_xml(request: request, type: str) -> str:
     :param type: Type of needed processing: xsd, xslt or xpath
     :type type: str
     :raises ValueError: is raised when type is different than those provided above
-    :return: response JSON converted to string
-    :rtype: str
+    :return: response JSON converted to string and response code
+    :rtype: str, int
     """
     start = time.time_ns()
     code = 200