added savings-model-states.md

[Mugunth007]

Description

This pull request adds a new entry titled "Saving Model States in PyTorch" under the PyTorch topic. The entry provides an explanation of the concept, syntax for saving and loading model states using PyTorch, and a complete example demonstrating how to save and load model and optimizer states during a training workflow. The addition ensures learners can understand and implement model checkpointing effectively.

Issue Solved

Closes #5868

Type of Change

Adding a new entry

Checklist

• [Done] All writings are my own.
• [Done] My entry follows the Codecademy Docs style guide.
• [Done] My changes generate no new warnings.
• [Done] I have performed a self-review of my own writing and code.
• [Done] I have checked my entry and corrected any misspellings.
• [Done] I have made corresponding changes to the documentation if needed.
• [Done] I have confirmed my changes are not being pushed from my forked main branch.
• [Done] I have confirmed that I'm pushing from a new branch named after the changes I'm making.
• [Done] I have linked any issues that are relevant to this PR in the Issues Solved section.

[CLAassistant]

All committers have signed the CLA.

[PragatiVerma18]

Hey @Mugunth007, thanks for contributing to docs; however, we won't be able to accept or review this submission as it is missing some key requirements, such as the essential metadata and formatting required for a doc entry; please refer to our style guide for more info.

Also, the PR should be raised from a feature branch and not the main branch. I am closing this PR for now. Please fix the mentioned issues and feel free to raise another PR for review. Thanks.