release-notes: grammar fixes
release-notes: grammar fixes

Co-Authored-By: Taylor Silva <33b075afcd0610c62dcb82fe76b4c1adc69221da@pivotal.io>
Signed-off-by: Ciro S. Costa <4f5054ab2db051d03adf9068233a850c82b24437@pivotal.io>

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse