Improve wording across example Colab notebooks #1555

Job	Run time
build	12m 44s
abf-alanine-dipeptide-openmm	8m 16s
alanine-dipeptide-string	8m 20s
alanine-dipeptide-openmm-mpi	8m 57s
abf-tip3p-water-ase	4m 12s
cff-butane-hoomd	3m 45s
cv-ermsd-cg-openmm-unbiased	3m 34s
cv-ermsd-openmm-unbiased	3m 40s
cv-pucker-openmm-unbiased	3m 46s
forward-flux-sampling	19m 29s
funn-butane-hoomd	3m 41s
harmonic-bias-hoomd	5m 57s
improved-string-hoomd	4m 12s
metad-alanine-dipeptide-openmm	3m 58s
openmm-nacl-metad-displacement	3m 30s
metad-hoomd	6m 53s
umbrella-integration-hoomd	4m 4s
spectral-abf-alanine-dipeptide-openmm	5m 6s
umbrella-integration-hoomd-mpi	3m 25s
unbiased-hoomd	3m 57s
	2h 1m 26s

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