FIX: Menu working in on register page

[Jaimin25]

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Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

Register menu fixed

Fixed menu not working on register page and also made some style changes in register.css to see the menu clearly. closes #120

https://github.com/NITRR-Open-Source-Community/NOSC-Website/assets/65119631/e2b65e93-ec9e-4909-8917-ac1b0950e1e4

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