Merge pull request #3420 from blnicho/finalize-release-6.8.1 #473

Job	Run time
linux/3.13	34m 15s
linux/3.8/bare-env	13s
osx/3.10	19m 16s
lint/style-and-typos	2m 21s
win/3.9	53m 30s
linux/3.11/conda	21m 49s
linux/3.10/mpi	9m 34s
linux/3.12/cython	23m 34s
win/3.8/pip	30m 3s
process-coverage-${{ matrix.TARGET }}	0s
	3h 14m 35s

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