Python dependency: Bump pbr from 7.0.0 to 7.0.1 in /web/regression

Bumps [pbr](https://docs.openstack.org/pbr/latest/) from 7.0.0 to 7.0.1.

---
updated-dependencies:
- dependency-name: pbr
  dependency-version: 7.0.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

web/regression/requirements.txt

@@ -24,7 +24,7 @@
 extras==1.0.0
 fixtures==4.2.6
 linecache2==1.0.0
-pbr==7.0.0
+pbr==7.0.1
 pycodestyle>=2.5.0
 python-mimeparse==2.0.0
 # Do not upgrade selenium until latest version supports urllib3 2.5.*