stepreporter: fix class name in DeprecationWarning

Fixes: a3df4e6 ("stepreporter: deprecate it")
Signed-off-by: Bastian Krause <[email protected]>

Author: Bastian-Krause

labgrid/stepreporter.py

@@ -19,7 +19,7 @@ def start(cls):
         from warnings import warn
         warn(
             """
-            StepLogger is deprecated, use the StepLogger and basicConfig from labgrid.logging
+            StepReporter is deprecated, use the StepLogger and basicConfig from labgrid.logging
             instead which integrates with the python logging infrastructure.
             """,
             DeprecationWarning,