Update ko to 0.15.1 and Go to go1.22.2 for publish task

[khrm]

Changes

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• 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
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Release Notes

NONE

[khrm]

/kind misc

[khrm]

It's difficult to find go version from container registry, that's why I decided to use latest image sha

[khrm]

/assign @savitaashture @dibyom

[khrm]

/test tekton-triggers-unit-tests

[khrm]

/test pull-tekton-triggers-build-tests

[savitaashture]

Based on you PR title How do we ensure its ko 0.15.1 & go1.22.2?

[khrm]

By running the container with the image and checking version inside it.

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: savitaashture

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[khrm]

@dibyom Can you merge this?

[savitaashture]

/lgtm