[release-v0.23.x] Upgrade golang.org/x/crypto to 0.31.0

[savitaashture]

Changes

Fixing a critical CVE.
See GHSA-v778-237x-gjrc

Ref PR : tektoncd/operator#2454

Submitter Checklist

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

• Has Docs included if any changes are user facing
• Has Tests included if any functionality added or changed
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  functionality, content, code)
• Release notes block below has been updated with any user facing changes (API changes, bug fixes, changes requiring upgrade notices or deprecation warnings)
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Release Notes

NONE

[savitaashture]

/assign @PuneetPunamiya

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[savitaashture]

/kind security

[lcarva]

/lgtm

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