Updated index.md with icons

[ArjunGK22]

Issue #83

Added Icon for Twitter / GitHub / Linked etc. icons on Introduction page.

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 have a look at it and let me know if any changes has to be made. Thank you

[anvithks]

Please check the review comments. I have linked the Learn Hugo theme documentation. This is the theme we are using for the website.

[anvithks]

Please check the deploy preview.
The logos are not appearing.

[ArjunGK22]

sure sir...I will check and update it....Thank you

[anvithks]

@ArjunGK22 Please check the deploy preview. Looks like the alignment is not correct.

Consider a different approach to making this section. You need not just add the logos to the list.
The primary intention of adding logos was to make it more easier for people to identify the service / platform that they could reach us on.

[ArjunGK22]

Is there any way to look at the deployment preview before giving a pull request. Becoz when I see locally it is perfect.