Changing style of NavBar, Testimonial and services section in dark mode

[DhairyaMajmudar]

Related Issue

Changing the colors of navbar, testimonials and services in dark mode #191

Proposed Changes

Change 1: Changed color of the Navbar
Change 2: Changed color of Services
Change 3: Changed color of Testimonials

Checklist

• ✅ My code follows the code style of this project.
• 📝 My change requires a change to the documentation.
• 🎀 I have updated the documentation accordingly.
• 🌟 ed the repo

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Output Screenshots

Screenshot #1	Screenshot #2
Before Change	After Change

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[DhairyaMajmudar]

@agamjotsingh18 I have resolved the conflicts

[DhairyaMajmudar]

@agamjotsingh18 please merge my PR because even after solving the previous conflicts these new conflicts have been raised due to new merge in the last two days