Fixes typo in docstring.

PiperOrigin-RevId: 757876640

Author: tfx-copybara

tensorflow_data_validation/statistics/generators/lift_stats_generator.py

@@ -477,7 +477,7 @@ def _compute_lifts(
 
 
 class _WeakRefFrozenMapping(collections.abc.Mapping, object):
-  """A weakly-referencable dict, necessary to allow use with shared.Shared.
+  """A weakly-referenceable dict, necessary to allow use with shared.Shared.
 
   Note that the mapping will not be frozen until freeze() is called.
   """