chore(deps): update quay.io/keycloak/keycloak docker tag to v21

This MR contains the following updates:

Package	Update	Change
quay.io/keycloak/keycloak	major	20.0.5 -> 21.0.1

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changed the description

added 20 commits

• 96228add...d58c9041 - 19 commits from branch main
• cb468bf3 - chore(deps): update quay.io/keycloak/keycloak docker tag to v21

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merged