[dependabot]: Bump pulp-cli from 0.25.4 to 0.25.6 in /automation

Bumps [pulp-cli](https://github.com/pulp/pulp-cli) from 0.25.4 to 0.25.6.
- [Release notes](https://github.com/pulp/pulp-cli/releases)
- [Changelog](https://github.com/pulp/pulp-cli/blob/0.25.6/CHANGES.md)
- [Commits](pulp/pulp-cli@0.25.4...0.25.6)

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

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

automation/requirements.txt

@@ -8,5 +8,5 @@ pulpcore-client==3.49.10
 pulp-rpm-client==3.25.4
 pulp-ostree==2.3.0
 pulp-glue==0.25.4
-pulp-cli==0.25.4
+pulp-cli==0.25.6
 pulp-cli-deb==0.1.0