[Term Entry]Py torch tensors .mean()

[Radhika-okhade]

Description

A new term entry about the .mean() method for Tensors.

Issue Solved

5062

Type of Change

• Adding a new entry

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.