Update dependency keycloak/keycloak to v16

This MR contains the following updates:

Package	Update	Change
keycloak/keycloak	major	12.0.2 -> 16.0.0

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Release Notes

keycloak/keycloak

v16.0.0

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v15.1.1

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v15.1.0

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v15.0.2

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v15.0.1

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v15.0.0

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v14.0.0

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v13.0.1

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v13.0.0

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v12.0.4

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v12.0.3

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Configuration

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