Fix baremetal link

[ckotzbauer]

What this PR does / why we need it:

• Fix broken link in the docs for bare-metal guide.

Which issue this PR fixes: -

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: code-chris
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[ckotzbauer]

signed CLA

[ElvinEfendi]

@code-chris seems like your change is actually breaking a working link, what am I missing?

[ckotzbauer]

@ElvinEfendi The link points to this address: https://kubernetes.github.io/ingress-nginx/deploy/baremetal.md/
The ".md" is wrong, the page is broken now.

[aledbf]

nginx/deploy/baremetal.md/
The ".md" is wrong, the page is broken now.

The real issue here is the / at the end. Please just remove that

[aledbf]

Closing. Fixed in #3456