feat: Link about us button on navbar and footer to About us in home page

[its-ayush-07]

Related Issue

Fixes: #677

Describe the changes you've made

Linked About Us button on navbar and footer to About us section in home page

Checklist:

• [x] My code follows the style guidelines of this project.
• [x] 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.
• [x] My changes generate no new warnings.

Screenshots

https://user-images.githubusercontent.com/74665996/186420000-035116ec-04fb-49ca-b474-f6d92bef1871.mp4

[github-actions[bot]]

Our team will soon review your PR. Thanks @its-ayush-07 :)

[github-actions[bot]]

Thank you @its-ayush-07 for taking out your valuable time in order to contribute to our project. Looking forward for more such amazing contributions :).