Update syntax for second parameter in split() method

[christina-ml]

Description

Closes #3402

This edit is for the Python Strings: Split method located under the file path docs/content/python/concepts/strings/terms/split/split.md

Edit the syntax section to clarify that the second parameter in the split() method is the maximum number of splits. Also include the default when a number isn't given.

My changes:

• Edit syntax section to clarify that the second parameter in the split() method is the maximum number of splits
• Rename second parameter from number_of_items to maxsplit for clarification as to what this parameter does. It is not a count for the number of items, instead it sets a maximum number of times the string can be split.
• Explain what the default value is if second parameter is not specified, or if the second parameter has a value of -1

Type of Change

• Editing an existing entry (fixing a typo, bug, issues, etc)
• Updating the documentation

Checklist

• All writings are my own.
• My entry follows the Codecademy Docs style guide.
• My changes generate no new warnings.
• I have performed a self-review of my own writing and code.
• I have checked my entry and corrected any misspellings.
• I have made corresponding changes to the documentation if needed.
• I have confirmed my changes are not being pushed from my forked main branch.
• I have confirmed that I'm pushing from a new branch named after the changes I'm making.
• Under "Development" on the right, I have linked any issues that are relevant to this PR (write "Closes # in the "Description" above).

[CLAassistant]

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[caupolicandiaz]

@christina-ml Just a couple of edits. Please update the entry, and tag me when you've finished the changes. Thanks

[christina-ml]

@caupolicandiaz I updated the entry with the suggested changes.

[caupolicandiaz]

@christina-ml This is ready for a second review.

[SSwiniarski]

@christina-ml, @caupolicandiaz looks good to me.

[github-actions]

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