Bump pbr from 6.1.0 to 7.0.0

Bumps [pbr](https://docs.openstack.org/pbr/latest/) from 6.1.0 to 7.0.0.

---
updated-dependencies:
- dependency-name: pbr
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -13,7 +13,7 @@ flake8==7.3.0
 lxml==6.0.0
 extras==1.0.0
 fixtures==4.2.2
-pbr==6.1.0
+pbr==7.0.0
 
 six==1.17.0
 sqlparse==0.5.3  # django-debug-toolbar