[stable/fluent-bit] Fix table formatting in Readme.md

[sagarjauhari]

What this PR does / why we need it:

Table formatting broken in Readme

Which issue this PR fixes

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged)

• fixes #

Special notes for your reviewer:

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• DCO signed
• Chart Version bumped
• Variables are documented in the README.md
• title of the PR contains starts with chart name e.g. [stable/chart]

[k8s-ci-robot]

Hi @sagarjauhari. Thanks for your PR.

I'm waiting for a helm member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[edsiper]

Please sign-off the commit (git commit -a -s...)

[edsiper]

/ok-to-test

[edsiper]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: edsiper, sagarjauhari

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