fix: removed white outline in the Join Discord Server button

[RickParamanik18]

What does this PR do?

fixed #1742 by removing few tailwind classes

Fixes #1742

Type of change

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

How should this be tested?

• [x] Go to Homepage
• [x] Locate "Join Discord Button" in the hero section
• [x] Click

Mandatory Tasks

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

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