Fix minor grammar error (GH-31325)

"an" followed by consonant should be "a"
(cherry picked from commit 0d29e7a06f98e8312b699d4531d27b76add1249f)

Co-authored-by: Scott Noyes <snoyes@gmail.com>

Miss Islington (bot) committed 4y ago

5574cacf5727764c462f9f37cc30e68a3dacbaa5

Parent: a606c6a

Committed by GitHub <noreply@github.com> on 2/14/2022, 7:09:57 PM