[UI/UX]: Add sticky navbar to the site

[hariketsheth]

Description

Changes

• Add sticky navbar to the site.

It will improve UI

Type of Contribution

UI Fix

Code of Conduct

• I follow Contributing Guidelines & Code of conduct of this project.

[github-actions]

Hello @hariketsheth,
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[YASH-YADAV-dynamo]

@hariketsheth please assign this issue to me .
I will make a sticky navbar that will improve UI.

[hariketsheth]

Thanks @YASH-YADAV-dynamo for your interest.

Sure, go ahead with your contribution.
All the best 💫