fix: Issue#812 fixed

[ParnaRoyChowdhury777]

Title and Issue number

Title : navbar made uniform in the main page and the rate us page

Issue No. : #812

Code Stack : HTML, CSS and Javascript

Close #812

Description

I have removed the previous PR and made this new PR to avoid merge conflicts.

Video/Screenshots (mandatory)

Type of PR

• Bug fix
• Feature enhancement

Checklist:

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have tested the changes thoroughly before submitting this pull request.
• I have provided relevant issue numbers, screenshots, and videos after making the changes.
• I have gone through the contributing.md file before contributing

Additional context:

##Are you contributing under any Open-source programme?

• I am contributing under GSSOC'24
• I am contributing under VSOC'24

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[ParnaRoyChowdhury777]

@apu52 there are no more branch conflicts. Please check

[apu52]

@ParnaRoyChowdhury777 still has some conflicts please check & resolve the conflicts , So that I can review the PR