Update dependency open-policy-agent/gatekeeper to v3.21.1

[renovate]

This PR contains the following updates:

Package	Update	Change
open-policy-agent/gatekeeper	patch	v3.21.0 → v3.21.1

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Release Notes

open-policy-agent/gatekeeper (open-policy-agent/gatekeeper)

v3.21.1

Compare Source

Bug Fixes

• enforce timeout on external data provider requests cherry-pick (#​4351) (#​4359) #​4359 (Jaydip Gabani)

Chores

• bump github.com/containerd/containerd from 1.7.28 to 1.7.29 cp #​4223 (#​4360) #​4360 (Jaydip Gabani)
• bump golang.org/x/crypto from 0.43.0 to 0.45.0 CP(#​4254) (#​4364) #​4364 (Jaydip Gabani)
• bump golang from 7534a62 to 04741b0 CP(#​4341) (#​4365) #​4365 (Jaydip Gabani)
• bumping kubectl to resolve CVE CP(#​4248) (#​4366) #​4366 (Jaydip Gabani)
• Prepare v3.21.1 release (#​4367) #​4367 (github-actions[bot])

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