build(deps): bump pbr from 5.11.0 to 5.11.1

Bumps [pbr](https://docs.openstack.org/pbr/latest/) from 5.11.0 to 5.11.1.

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

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

requirements.txt

@@ -48,7 +48,7 @@ mf2util==0.5.1
 mox3==1.1.0
 oauthlib==3.2.2
 packaging==23.0
-pbr==5.11.0
+pbr==5.11.1
 praw==7.6.1
 prawcore==2.3.0
 proto-plus==1.22.2