[dependabot]: Bump pulp-ansible from 0.21.5 to 0.21.6 in /automation

Bumps [pulp-ansible](https://github.com/pulp/pulp_ansible) from 0.21.5 to 0.21.6.
- [Release notes](https://github.com/pulp/pulp_ansible/releases)
- [Changelog](https://github.com/pulp/pulp_ansible/blob/0.21.6/CHANGES.rst)
- [Commits](pulp/pulp_ansible@0.21.5...0.21.6)

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

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

automation/requirements.txt

@@ -2,7 +2,7 @@ pulpcore==3.49.10
 pulp-container==2.20.0
 pulp-deb==3.2.0
 pulp-rpm==3.25.4
-pulp-ansible==0.21.5
+pulp-ansible==0.21.6
 pulp-python==3.11.1
 pulpcore-client==3.49.10
 pulp-rpm-client==3.25.4