Conditionally rendering LinkedIn URLs based on the availability

[janithlahirukariyawasam]

Purpose

The purpose of this PR is to fix #1541

Goals

The goal of this PR is to conditionally render the Linkedin URLs.

Preview Link

https://pr-1543-sef-site.surge.sh/scholarx/archive/

Checklist

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

Related PRs

## Learning