Update IRC page with new profiles

[janethavi]

Purpose

Add new IRC profiles.
The purpose of this PR is to fix #758

Goals

New research profiles are added.

Approach

Added the linked in profile pictures to the asserts.
Update the irc json file with new profiles

Screenshots

Preview Link

https://pr-767-sef-site.surge.sh/

Checklist

• This PR doesn't commit any keys, passwords, tokens, usernames, or other secrets.
• I have read and understood the development best practices guidelines ( http://bit.ly/sef-best-practices )
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation

Test environment

-Ubuntu 18.04, Google Chrome

[akshika47]

@janethavi you might want to get a better image of Ravihansa. His image has a sticker on it.

[janethavi]

@akshika47 I Updated ravihansa's photo

[akshika47]

Thank you @janethavi , Clearly, these issues are getting easier for you looking at the speed that you are completing them. I think it is time to level up. Check issues in the ScholarX repo (https://github.com/sef-global/scholarx/issues)! I think they might be of interest to you.

[Piumal1999]

Thank you @janethavi !!!