Fix broken link in Python/Build a Reddit Bot

[islml]

Description

This pull request updates a broken link in the Python/Build a Reddit Bot tutorial. The previous link was returning a 404 error, so it has been replaced with the correct URL.

Motivation and Context

This change is necessary to ensure that users accessing the tutorial can reach the intended resource without encountering a broken link.

• Old Link: https://new.pythonforengineers.com/build-a-reddit-bot-part-1/
• New Link: https://new.pythonforengineers.com/blog/build-a-reddit-bot-part-1/

How Has This Been Tested?

• Verified that the new link opens correctly in a browser.
• And verified that it leads to the intended tutorial.

Types of changes

• [x] Content Update (change which fixes an issue or updates an already existing submission)
• [ ] New Article (change which adds functionality)
• [ ] Documentation change

Checklist:

• [x] My code follows the code style of this project.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have made checks to ensure URLs and other resources are valid