Bump pbr from 5.4.2 to 5.4.4
Bump pbr from 5.4.2 to 5.4.4

Bumps [pbr](https://docs.openstack.org/pbr/latest/) from 5.4.2 to 5.4.4.

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
mozilla/lumbergh,glogiotatidis/lumbergh,glogiotatidis/lumbergh,mozilla/lumbergh,mozilla/lumbergh,mozilla/lumbergh,glogiotatidis/lumbergh,glogiotatidis/lumbergh