Bump ruff from 0.6.7 to 0.6.8 #3384

Job	Run time
changes	4s
check-lockfile	7s
lint-crlf	5s
lint-newsfile	0s
lint	3m 24s
check-schema-delta	38s
Typechecking	3m 10s
check-sampleconfig	2m 27s
lint-pydantic	4m 35s
lint-clippy	0s
lint-clippy-nightly	0s
lint-readme	0s
lint-rustfmt	0s
linting-done	2s
calculate-test-jobs	3s
trial-olddeps	8m 22s
complement (monolith, SQLite)	12m 57s
complement (monolith, Postgres)	13m 24s
trial-pypy	0s
portdb (3.8, 11)	6m 9s
complement (workers, Postgres)	20m 34s
portdb (3.11, 15)	5m 47s
cargo-bench	0s
cargo-test	0s
trial (3.8, sqlite, all)	9m 58s
sytest (focal)	8m 31s
trial (3.8, postgres, 11, all)	15m 8s
sytest (focal, postgres)	11m 26s
trial (3.8, sqlite)	8m 24s
sytest (focal, multi-postgres, workers)	14m 1s
sytest (focal, multi-postgres, workers, asyncio)	19m 2s
export-data	5m 15s
tests-done	2s
	2h 53m 35s

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