Fixes eventlistener link and cel expression yaml example in docs

[danielfbm]

Changes

Eventlistener LoadBalancerClass link with wrong markdown syntax

cel_expression with invalid yaml example

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• Has Docs if any changes are user facing, including updates to minimum requirements e.g. Kubernetes version bumps
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[tekton-robot]

Hi @danielfbm. Thanks for your PR.

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[danielfbm]

/kind documentation

[khrm]

/ok-to-test

[khrm]

/lgtm

[danielfbm]

sorry, my IDE did more formatting then expected, I will revert some of the formatting changes

[danielfbm]

/hold

[danielfbm]

/unhold

[danielfbm]

@khrm hi~ can you help me to push this forward? not sure what happened with tide 😅

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dibyom

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[danielfbm]

@khrm can you please check again? thanks

[danielfbm]

@khrm hi~ sorry to bother again, is anything else needed to push this forward? thanks~

[khrm]

/lgtm
Sorry for the delayed response