Update local.py docstrings (#13373)
Update local.py docstrings (#13373)

* Update local.py

stride value implies the input argument of 'stride', and dilation_rate implies the input argument of 'dilation rate' of Conv1D function.
It is more explicit to express as code rather than using words stride value, dilation value.
Or, at least both stride and dilation_rate should be written in code, not only dilation rate as before document

* Update local.py

mark as code snippet

keras-team/keras,keras-team/keras