ISD-2551 update README for jenkins-agent-k8s #243

Job	Run time
integration-tests / Plan	4s
integration-tests / Plan	4s
integration-tests / Plan	4s
integration-tests / Build charm (jenkins-agent-k8s)	5m 36s
integration-tests / Build charm (jenkins-agent-k8s)	5m 36s
integration-tests / Build charm (jenkins-agent-k8s)	5m 36s
integration-tests / Build rock (jenkins-agent-k8s)	3m 6s
integration-tests / Build rock (jenkins-agent-k8s)	3m 6s
integration-tests / Build rock (jenkins-agent-k8s)	3m 6s
integration-tests / Plan Image Scanning	2s
integration-tests / Plan Image Scanning	2s
integration-tests / Plan Image Scanning	2s
integration-tests / Integration tests / Integration tests (test_agent_k8s.py)	9m 47s
integration-tests / Integration tests / Integration tests (test_agent_k8s.py)	24m 45s
integration-tests / Integration tests / Integration tests (test_agent_k8s.py)	8m 46s
integration-tests / Scan Image (ghcr.io-canonical-jenkins-agent-k8s-e444bef4e8c3ff3289f3d2a282be3aa105447fb1-_1.1_amd64.tar)	59s
integration-tests / Scan Image (ghcr.io-canonical-jenkins-agent-k8s-e444bef4e8c3ff3289f3d2a282be3aa105447fb1-_1.1_amd64.tar)	59s
integration-tests / Scan Image (ghcr.io-canonical-jenkins-agent-k8s-e444bef4e8c3ff3289f3d2a282be3aa105447fb1-_1.1_amd64.tar)	59s
integration-tests / Required Integration Test Status Checks	1s
integration-tests / Required Integration Test Status Checks	1s
integration-tests / Required Integration Test Status Checks	1s
	1h 12m 42s

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