Update python/lsst/pipe/base/tests/mocks/_pipeline_task.py

Co-authored-by: Andy Salnikov <[email protected]>

python/lsst/pipe/base/tests/mocks/_pipeline_task.py

@@ -143,7 +143,7 @@ def mock_pipeline_graph(
         Mapping from original task label to a 2-tuple indicating that some
         quanta should raise an exception when executed.  The first entry is a
         data ID match using the butler expression language (i.e. a string of
-        the sort passed ass the ``where`` argument to butler query methods),
+        the sort passed as the ``where`` argument to butler query methods),
         while the second is the type of exception to raise when the quantum
         data ID matches the expression.