Burger menu responsive

[hvb24]

What is the change?

Managed navbar to responsive

Related issue?

closes: #2

Checklist:

Before you create this PR, confirm all the requirements listed below by checking the checkboxes [x]:

• [x] I have followed the Code of Conduct.
• [x] I have checked there aren't other open Pull Requests for the same update/change.
• [x] I have you tested the code before submission.
• [x] I have commented my code, particularly in hard-to-understand areas.
• [x] My changes generates no new warnings.
• [x] I'm Hacktoberfest'21 contributor.

Screenshots (if any)

Before- After-

[hvb24]

please check it out @Chaitalishetty

[Chaitalishetty]

@hvb24 Can you resolve the conflicts? We are facing issue while merging

[hvb24]

@Chaitalishetty Done resolving the conflicts, check it out.