Added documentation entry for NumPy ndarray trace() method

[Nischay-loq]

Issue solved #7828

Type of Change
Adding a new entry
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.
I have linked any issues that are relevant to this PR in the Issues Solved section.

[CLAassistant]

All committers have signed the CLA.

[mamtawardhani]

Hey @Nischay-loq, please sign the CLA

[mamtawardhani]

Looks good for a second review! 🚀 But waiting for CLA

Hey @Nischay-loq, please sign the CLA

[Nischay-loq]

Hey @mamtawardhani, I have signed the CLA
Apologies for the late CLA signing .

[Nischay-loq]

@mamtawardhani I request that, if possible, do follow my GitHub account.
Looking forward to more collabs and contributions with you

[dakshdeepHERE]

LGTM 🚀

[github-actions]

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