Join us link updated

[LaxRaj]

Purpose

This will close #1601

Goals

Made the Join us link to the updated page.

Preview Link

https://pr-1601-sef-site.surge.sh/

Checklist

• [x] I have read and understood the development best practices guidelines
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas

Related PRs

## Learning

[YoshithaRathnayake]

@LaxRaj Already this issue has been assigned to @Sanjana0319 So it will be solved by this issue #1602 You can find some other issues on here