Fix quoting of commit message

[kierenevans]

Fixes:

+ ws app publish chart PR-50 example-project build artifact e9d5d04718e1325ccb0fbad54ede9c10644c869a

[/home/jenkins/workspace/ect_example-project_PR-50]:

  > rm -rf build-artifacts-repository
■■  > git clone git@github.com:example/repo.git ./build-artifacts-repository
■■  > git -C ./build-artifacts-repository config user.email example-project@example.com
■■  > mkdir -p ./build-artifacts-repository/build-artifacts/example-project/PR-50
■■  > rsync --exclude=*.twig --exclude=_twig --delete -a .my127ws/helm/app/ ./build-artifacts-repository/build-artifacts/example-project/PR-50/
■■  > git -C ./build-artifacts-repository add .
■■  > git -C ./build-artifacts-repository commit --allow-empty -m example-project build artifact e9d5d04718e1325ccb0fbad54ede9c10644c869a
■■error: pathspec 'build' did not match any file(s) known to git.
error: pathspec 'artifact' did not match any file(s) known to git.
error: pathspec 'e9d5d04718e1325ccb0fbad54ede9c10644c869a' did not match any file(s) known to git.