Regeneration check found diff

[github-actions]

The post-submit regeneration check found a diff.

Diff summary:

 .../google-cloud-monitoring-dashboards/noxfile.py  |  23 +--
.../google-cloud-monitoring-dashboards/setup.py    |   2 +-
.../testing/constraints-3.10.txt                   |   2 +-
.../test_dashboards_service.py                     | 170 +++++++++++----------
4 files changed, 94 insertions(+), 103 deletions(-)