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

Submitter Checklist

As the author of this PR, please check off the items in this checklist:

• [ ] Has Docs if any changes are user facing, including updates to minimum requirements e.g. Kubernetes version bumps
• [ ] Has Tests included if any functionality added or changed
• [x] Follows the commit message standard
• [x] Meets the Tekton contributor standards (including functionality, content, code)
• [x] Has a kind label. You can add one by adding a comment on this PR that contains /kind <type>. Valid types are bug, cleanup, design, documentation, feature, flake, misc, question, tep
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• [ ] Release notes contains the string "action required" if the change requires additional action from users switching to the new release

Release Notes

NONE

[tekton-robot]

Hi @danielfbm. Thanks for your PR.

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[danielfbm]

/kind documentation

[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~