DOCS: Update "connections" data type (#55290)
DOCS: Update "connections" data type (#55290)

The k8s plugin expects the "connections" field to be a list - current docs examples trigger:
 [WARNING]:  * Failed to parse {...}/inventory.yml with k8s plugin: Expecting connections to be a list.

Updated examples for `host` and  `namespaces` to reflect this.
thaim/ansible,thaim/ansible