update gatekeeper to 3.6.0-bb.1

Package Owner Merge Request

Package Changes

What package changes are included with this merge request? The more detail here the better!

Set validatingWebhookTimeoutSeconds to 15 seconds.

https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/releases/3.6.0-bb.1

https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/merge_requests/106

Additional Details

None

Known issues or expected conflicts?

None

Closes https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/issues/134