chore(deps): update registry-1.docker.io/bitnamicharts/keycloak docker tag to v21.4.1

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
registry-1.docker.io/bitnamicharts/keycloak (source)	minor	21.3.4 -> 21.4.1

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[!WARNING] Some dependencies could not be looked up. Check the warning logs for more information.

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Release Notes

bitnami/charts (registry-1.docker.io/bitnamicharts/keycloak)

### [`v21.4.1`](https://togithub.com/bitnami/charts/blob/HEAD/bitnami/keycloak/CHANGELOG.md#2141-2024-06-06) - \[bitnami/keycloak] Release 21.4.1 ([#​26967](https://togithub.com/bitnami/charts/pull/26967)) ### [`v21.4.0`](https://togithub.com/bitnami/charts/blob/HEAD/bitnami/keycloak/CHANGELOG.md#2140-2024-06-06) - \[bitnami/keycloak] Enable PodDisruptionBudgets ([#​26698](https://togithub.com/bitnami/charts/issues/26698)) ([503099e](https://togithub.com/bitnami/charts/commit/503099eea8bc4abee20e571f90a5ce85c2ed7788)), closes [#​26698](https://togithub.com/bitnami/charts/issues/26698)

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[jessebot]

might remove this in the future...