docs: add Python matplotlib pyplot ylim() documentation

[Priyanshjain10]

Description

Added comprehensive documentation for the ylim() function in matplotlib's pyplot module.

Issue Solved

Closes #7817

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.

[mamtawardhani]

Hey @Priyanshjain10, please link the second output image as well, and place it on this branch.

[Priyanshjain10]

Thank you @mamtawardhani for the review! You're absolutely right about the second output image for Example 2.

I'll push the updated commit shortly with both:

1. The second output image file in the media folder
2. The markdown reference to display it in Example 2

Thanks for catching that!

[Priyanshjain10]

Hi @mamtawardhani! I've added the second output image for Example 2:

✅ Added matplotlib-pyplot-ylim-example-2.png to the media folder
✅ Linked it in the documentation at line 97

All CI checks are now passing. Ready for re-review! 🚀

[Priyanshjain10]

@mamtawardhani Just a gentle reminder that the requested changes have been addressed. Would appreciate a re-review when you have a chance!