Build(deps): Bump python-swiftclient from 4.5.0 to 4.6.0 (#1743)

Bumps [python-swiftclient](https://github.com/openstack/swift) from 4.5.0 to 4.6.0.
- [Changelog](https://github.com/openstack/swift/blob/master/CHANGELOG)
- [Commits](https://github.com/openstack/swift/commits)

---
updated-dependencies:
- dependency-name: python-swiftclient
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Cooper Lees <[email protected]>

requirements_swift.txt

@@ -1,3 +1,3 @@
 keystoneauth1==5.6.0
 openstackclient==4.0.0
-python-swiftclient==4.5.0
+python-swiftclient==4.6.0