Small README cleanups #789

Job	Run time
ci (highest, windows-2025, 3.14, nocov)	1m 3s
ci (highest, macos-15, 3.14, nocov)	9m 8s
ci (highest, ubuntu-24.04, 3.14, nocov)	10m 48s
ci (highest, macos-15, 3.10, nocov)	9m 0s
ci (lowest-direct, ubuntu-24.04, 3.14, nocov)	10m 19s
ci (lowest-direct, ubuntu-24.04, 3.10, nocov)	10m 45s
ci (ubuntu-24.04, 3.11, nocov, lowest-direct)	10m 39s
ci (highest, ubuntu-24.04, 3.10, nocov)	10m 27s
ci (lowest-direct, windows-2025, 3.14, nocov)	1m 7s
ci (lowest-direct, windows-2025, 3.10, nocov)	1m 28s
ci (lowest-direct, macos-15, 3.10, nocov)	8m 55s
ci (ubuntu-24.04, 3.12, nocov, lowest-direct)	10m 25s
ci (ubuntu-24.04, 3.14, cov, lowest-direct)	10m 22s
ci (highest, windows-2025, 3.10, nocov)	55s
ci (ubuntu-24.04, 3.13, nocov, lowest-direct)	8m 13s
ci (lowest-direct, macos-15, 3.14, nocov)	8m 52s
publish	1m 3s
	2h 3m 29s

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