Docs: Highlight that Configuration is not DataFlow::Configuration

I made that mistake when just reading it over (DOH). I think that calling it
MyConfiguration makes it a bit more clear that this is a configuration class you
wrote yourself :D

Author: RasmusWL

docs/codeql/writing-codeql-queries/creating-path-queries.rst

@@ -58,15 +58,15 @@ You should use the following template:
     import DataFlow::PathGraph
     ...
 
-    from Configuration config, DataFlow::PathNode source, DataFlow::PathNode sink
+    from MyConfiguration config, DataFlow::PathNode source, DataFlow::PathNode sink
     where config.hasFlowPath(source, sink)
     select sink.getNode(), source, sink, "<message>"
 
 Where:
 
 - ``DataFlow::Pathgraph`` is the path graph module you need to import from the standard CodeQL libraries.
 - ``source`` and ``sink`` are nodes on the `path graph <https://en.wikipedia.org/wiki/Path_graph>`__, and ``DataFlow::PathNode`` is their type.
-- ``Configuration`` is a class containing the predicates which define how data may flow between the ``source`` and the ``sink``.
+- ``MyConfiguration`` is a class containing the predicates which define how data may flow between the ``source`` and the ``sink``.
 
 
 The following sections describe the main requirements for a valid path query.