fix: Corrected typo in testimonial section

[KingVibhor]

What does this PR do?

This PR corrects the typo in the testimonals section.
It changes 'feedback' to 'feedbacks'.

Fixes #19

Type of change

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

How should this be tested?

1. Open https://piyushgargdev-nextjs-kf9smz7vj-piyushgarg.vercel.app/
2. Scroll down to testimonials section of home page and check the spelling of 'feedbacks'.

• Opened the homepage and scroll down to check the spelling

Mandatory Tasks

• Make sure you have self-reviewed the code. A decent size PR without self-review might be rejected.

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