fix: Backchannel Logout: Fix error log when RP responds with status code 204 #1724

Job	Run time
Generate SDKs	1m 16s
Run OIDC conformity tests	10m 37s
Run HSM tests	6m 19s
Run end-to-end tests (memory)	4m 39s
Run tests and lints	11m 59s
Run end-to-end tests (memory, --jwt)	5m 6s
Run end-to-end tests (postgres)	4m 45s
Run end-to-end tests (postgres, --jwt)	5m 35s
Run end-to-end tests (mysql)	5m 24s
Run end-to-end tests (mysql, --jwt)	5m 3s
Run end-to-end tests (cockroach)	5m 12s
Run end-to-end tests (cockroach, --jwt)	5m 25s
Build CLI docs	57s
Generate changelog	0s
Generate release	0s
Draft newsletter	0s
Release SDKs	0s
Render version schema	0s
Pending approval Slack notification	0s
Send newsletter	0s
	1h 12m 17s

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