Update registry1.dso.mil/ironbank/opensource/external-secrets/external-secrets Docker tag to v0.16.2

This MR contains the following updates:

Package	Update	Change
registry1.dso.mil/ironbank/opensource/external-secrets/external-secrets (source)	patch	v0.16.1 -> v0.16.2
registry1.dso.mil/ironbank/opensource/external-secrets/external-secrets (source)	patch	0.16.1 -> 0.16.2

Complete MR checklist

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• Followed upgrade instructions outlined in docs/DEVELOPMENT_MAINTENANCE.md
• Update Docs with new/updated steps as needed
• Tested and Validated Changes made with supporting info like logs or screenshots from test pipelines

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• Tested and Validated changes

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Upgrade Notices

BREAKING CHANGE

v0.17.0 Stops serving v1beta1 apis. You need to update your manifests from v1beta1 to v1 prior to updating from v0.16 to v0.17.

The only change needed is upgrading your manifests to v1 (i.e. removing the beta1 from v1beta1).

Be sure to do that to all your manifests prior to bumping to v0.17.0! v0.16.2 already supports v1 so this process should be smooth.