Update _index.md

[skdwriting]

more details added

What type of PR is this?

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:

Which issue(s) this PR fixes:

Fixes #

Test Report Added?:

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/kind TESTED
/kind NOT-TESTED

Test Report:

Special notes for your reviewer:

[anvithks]

LGTM