minimal change in the benchmark help text #2989

Job	Run time
codecheck / codecheck	43m 40s
conda / conda (ubuntu-20.04)	11m 20s
docker / docker (fedora39)	20m 40s
conda / conda (macos-12)	22m 13s
docker / docker (rocky8)	23m 39s
linux / linux (-doc-mpi-)	40m 30s
conda / conda (macos-14)	8m 19s
linux / linux (-mpi-)	49m 19s
mac / macsimple (macos-12)	9m 29s
linux / linux (-coverage-mpi-)	1h 6m 10s
mac / macports (macos-12)	14m 50s
mac / macports (macos-14)	9m 4s
mac / macsimple (macos-14)	5m 20s
mac / macports (+allmodules, macos-12)	26m 49s
linux / linux (-debug-)	32m 36s
linux / linux (-debug-mpi-)	41m 57s
linux / linux (-intel-)	47m 53s
linux / linux (-pycv-mpi-)	17m 0s
	8h 10m 48s

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