Refactored Chatbot icon; Fixed nested URLs 404 page bug

[vansh-codes]

Description

TASKS DONE:

• changed the chatbot svg to new icon and added floating animation to make it more alive as suggested by Mastan Sayyed
• In the 404 not found page for nested invalid urls, the mini game was not working, fixed that error
• changed the favicon linking to the image from assets folder and made the path absolute path

Fixes # (issue)

Type of change

• Added a new machine learning frameworks, libraries or software.
• Documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible. In the meantime, please ensure that your changes align with our CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊

[vansh-codes]

@sanjay-kv please review!

[sanjay-kv]

awesome