website: bump postcss from 8.4.31 to 8.4.35 in /website #39

Job	Run time
lint (bandit)	1m 38s
test-migrations	1m 47s
lint (black)	1m 29s
lint (codespell)	1m 28s
lint (isort)	1m 21s
lint (pending-migrations)	1m 33s
lint (pylint)	2m 51s
lint (pyright)	1m 35s
lint (ruff)	1m 24s
test-e2e (proxy)	4m 13s
test-e2e (oauth)	5m 43s
test-e2e (oauth-oidc)	4m 29s
test-integration	4m 15s
test-e2e (saml)	4m 13s
test-migrations-from-stable - PostgreSQL 12-alpine	1m 23s
test-e2e (ldap)	8m 1s
test-unittest - PostgreSQL 12-alpine	7m 20s
test-migrations-from-stable - PostgreSQL 15-alpine	1m 27s
test-e2e (radius)	3m 43s
test-migrations-from-stable - PostgreSQL 16-alpine	1m 17s
test-e2e (flows)	4m 36s
test-unittest - PostgreSQL 15-alpine	7m 28s
test-unittest - PostgreSQL 16-alpine	7m 45s
ci-core-mark	0s
build	0s
build-arm64	0s
	1h 20m 59s

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