[dependabot]: Bump pulp-ansible from 0.21.7 to 0.21.8 in /automation

Bumps [pulp-ansible](https://github.com/pulp/pulp_ansible) from 0.21.7 to 0.21.8.
- [Release notes](https://github.com/pulp/pulp_ansible/releases)
- [Changelog](https://github.com/pulp/pulp_ansible/blob/0.21.8/CHANGES.md)
- [Commits](pulp/pulp_ansible@0.21.7...0.21.8)

---
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==3.49.17
 pulp-container==2.20.2
 pulp-deb==3.2.1
 pulp-rpm==3.26.1
-pulp-ansible==0.21.7
+pulp-ansible==0.21.8
 pulp-python==3.11.2
 pulpcore-client==3.49.17
 pulp-rpm-client==3.26.1