Serializer doc changes

[neelasha23]

Describe your changes

Adding serializer (cloudpickle, dill) option to the documentation. soorgeon refactor nb.ipynb --serializer dill soorgeon refactor nb.ipynb --serializer cloudpickle (for variables that cannot be serialized by pickle)

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Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I have added thorough tests (when necessary).
• [x] I have added the right documentation (when needed). Product update? If yes, write one line about this update.