Updated README.md and fixed issue #344

[navanitnandakumar]

Fixed broken link for 'Choose Your Own Adventure Presentations' under Python>Web Applications section

Description

Removed remaining dead links under the Python section
Fixed dead link for 'Choose Your Own Adventure Presentations'

Motivation and Context

Clean up dead or outdated tutorials

How Has This Been Tested?

Edited my own repo's README to make sure that the link is fixed.

Types of changes

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

Checklist:

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