chore(flux): update image cert-manager v1.20.1 → v1.20.2

[renovate]

This PR contains the following updates:

Package	Update	Change
cert-manager (source)	patch	v1.20.1 → v1.20.2

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Release Notes

cert-manager/cert-manager (cert-manager)

v1.20.2

Compare Source

v1.20.2

Compare Source

v1.20.2 fixes invalid YAML generated in the Helm chart when both webhook.config
and webhook.volumes are defined, and bumps Go to 1.26.2 along with dependencies
to address reported vulnerabilities.

Changes by Kind

Bug or Regression

• Helm: Fix invalid YAML generated when both webhook.config and webhook.volumes are defined. (#​8665, @​cert-manager-bot)

Other (Cleanup or Flake)

• Bump go dependencies with reported vulnerabilities (#​8704, @​erikgb)
• Bump go to 1.26.2 (#​8703, @​erikgb)

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