Removed fedora installation instruction from installation.md

[utkarsh-singh1]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Installation instruction for linux, it can Also be installed with brew or using go install method.

Which issue(s) this PR fixes:

Fixes # 1773

Special notes for your reviewer:

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[utkarsh-singh1]

Also, seems like the package is not updated for a long time - https://github.com/dustymabe/fedpkg-kompose

[cdrage]

/lgtm

[cdrage]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cdrage, utkarsh-singh1

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[utkarsh-singh1]

Thanks, @cdrage, for approval.

Fixes #1773