docs: update doc example for get oauth2-client #1792

Job	Run time
Run OIDC conformity tests	8m 41s
Generate SDKs	1m 11s
Run HSM tests	6m 21s
Run tests and lints	14m 13s
Run end-to-end tests (memory)	4m 44s
Run end-to-end tests (memory, --jwt)	5m 17s
Run end-to-end tests (postgres)	4m 56s
Run end-to-end tests (postgres, --jwt)	4m 52s
Run end-to-end tests (mysql)	5m 19s
Run end-to-end tests (mysql, --jwt)	4m 57s
Run end-to-end tests (cockroach)	5m 15s
Run end-to-end tests (cockroach, --jwt)	5m 49s
Build CLI docs	53s
Generate changelog	0s
Generate release	0s
Render version schema	0s
Release SDKs	0s
Draft newsletter	0s
Send newsletter	0s
Pending approval Slack notification	0s
	1h 12m 28s

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