Icon patch

[ArjunGK22]

What type of PR is this?
This PR adds the icons to the links like github, mail, linkedin, slack in the introduction page.

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:

/kind new feature
/kind bug fix
/kind cleanup
/kind revert change
/kind design
/kind documentation
/kind enhancement

What this PR does / why we need it:
Gives a visual navigation to user rather than just textual.

Which issue(s) this PR fixes:

Fixes #83

Test Report Added?:

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind TESTED
/kind NOT-TESTED

Test Report:

Special notes for your reviewer:

@anvithks Kindly check the updated file. Thank you