chore(deps): update elasticsearch docker tag to v19.21.2 #1082

Job	Run time
Generate chart matrix	9s
Unit Test - Camunda 8.4 / Generate components matrix	5s
Unit Test - Camunda 8.3 / Generate components matrix	6s
Validation - Camunda 8.3 / Lint	1m 49s
Validation - Camunda 8.4 / Lint	1m 34s
Unit Test - Camunda 8.3 / Core - Unit Test	3m 18s
Unit Test - Camunda 8.3 / Apps - Unit Test	3m 38s
Unit Test - Camunda 8.3 / Zeebe - Unit Test	2m 58s
Unit Test - Camunda 8.3 / WebModeler - Unit Test	4m 22s
Unit Test - Camunda 8.4 / Core - Unit Test	4m 54s
Unit Test - Camunda 8.4 / Apps - Unit Test	3m 44s
Unit Test - Camunda 8.4 / Zeebe - Unit Test	3m 10s
Unit Test - Camunda 8.4 / WebModeler - Unit Test	4m 6s
Integration Test - Camunda 8.4 / Generate workflow matrix	3s
Integration Test - Camunda 8.3 / Generate workflow matrix	13s
Integration Test - Camunda 8.4 / Kubernetes - Chart Setup	21m 35s
Integration Test - Camunda 8.4 / Kubernetes - Chart Upgrade	26m 18s
Integration Test - Camunda 8.3 / Kubernetes - Chart Setup	21m 32s
Integration Test - Camunda 8.3 / Kubernetes - Chart Upgrade	25m 42s
	2h 9m 16s

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