Use rstcheck to "lint" the README #1940

Job	Run time
check-lockfile	8s
check-lockfile	8s
lint-crlf	5s
lint-crlf	5s
changes	2s
changes	2s
lint-newsfile	33s
lint-newsfile	33s
Typechecking	1m 35s
Typechecking	1m 35s
check-sampleconfig	54s
check-sampleconfig	54s
lint	51s
lint	51s
check-schema-delta	38s
check-schema-delta	38s
lint-clippy	23s
lint-clippy	23s
lint-clippy-nightly	30s
lint-clippy-nightly	30s
lint-pydantic	41s
lint-pydantic	41s
lint-readme	0s
lint-readme	0s
lint-rustfmt	18s
lint-rustfmt	18s
linting-done	3s
linting-done	3s
calculate-test-jobs	4s
calculate-test-jobs	4s
trial-olddeps	7m 13s
trial-olddeps	7m 13s
portdb (3.8, 11)	3m 0s
portdb (3.8, 11)	3m 0s
complement (monolith, SQLite)	12m 51s
complement (monolith, SQLite)	12m 51s
portdb (3.11, 15)	2m 56s
portdb (3.11, 15)	2m 56s
complement (monolith, Postgres)	14m 0s
complement (monolith, Postgres)	14m 0s
complement (workers, Postgres)	21m 18s
complement (workers, Postgres)	21m 18s
cargo-bench	0s
cargo-bench	0s
cargo-test	0s
cargo-test	0s
trial-pypy	0s
trial-pypy	0s
sytest (focal)	8m 14s
sytest (focal)	8m 14s
trial (3.8, sqlite, all)	4m 58s
trial (3.8, sqlite, all)	4m 58s
sytest (focal, postgres)	10m 11s
sytest (focal, postgres)	10m 11s
trial (3.8, postgres, 11, all)	11m 9s
trial (3.8, postgres, 11, all)	11m 9s
sytest (focal, multi-postgres, workers)	13m 10s
sytest (focal, multi-postgres, workers)	13m 10s
trial (3.8, sqlite)	4m 34s
trial (3.8, sqlite)	4m 34s
sytest (focal, multi-postgres, workers, asyncio)	22m 5s
sytest (focal, multi-postgres, workers, asyncio)	19m 12s
export-data	2m 3s
export-data	2m 3s
tests-done	6s
tests-done	4s
	4h 46m 11s

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