chore(deps): update docker.io/bitnami/keycloak docker tag to v26 #4

Namespace: <a href="https://detailurl.setting.custom-console-url-namespace.is.not.configured" rel="nofollow">trusted-content-tenant
PipelineRun: <a href="https://console.redhat.com/application-pipeline/ns/trusted-content-tenant/pipelinerun/trustification-qe-test-on-pull-request-6wlgl" rel="nofollow">trustification-qe-test-on-pull-request-6wlgl

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Red Hat Konflux/trustification-qe-test-on-pull-request has successfully validated your commit.

Status	Duration	Name
✅ Succeeded	20 seconds	init
✅ Succeeded	2 minutes	clone-repository
✅ Succeeded	21 seconds	prefetch-dependencies
✅ Succeeded	16 minutes	build-container
✅ Succeeded	7 seconds	build-image-index
✅ Succeeded	1 minute	clamav-scan
✅ Succeeded	8 seconds	coverity-availability-check
✅ Succeeded	23 seconds	clair-scan
✅ Succeeded	15 seconds	sast-shell-check
✅ Succeeded	10 seconds	sast-unicode-check
✅ Succeeded	1 minute	deprecated-base-image-check
✅ Succeeded	3 minutes	ecosystem-cert-preflight-checks
✅ Succeeded	2 minutes	sast-snyk-check
✅ Succeeded	1 minute	rpms-signature-scan
✅ Succeeded	1 minute	apply-tags
✅ Succeeded	1 minute	push-dockerfile
✅ Succeeded	9 seconds	show-sbom