fix references to sample files in setup.cfg (#4882)

setup.cfg

@@ -33,12 +33,18 @@ data_files =
         LICENSE
         README.md
     usr/share/doc/kubespray/inventory/ =
-        inventory/sample/hosts.ini
+        inventory/sample/inventory.ini
     etc/kubespray/ =
         ansible.cfg
     etc/kubespray/inventory/sample/group_vars/ =
-        inventory/sample/group_vars/all.yml
-        inventory/sample/group_vars/k8s-cluster.yml
+        inventory/sample/group_vars/etcd.yml
+    etc/kubespray/inventory/sample/group_vars/all/ =
+        inventory/sample/group_vars/all/all.yml
+        inventory/sample/group_vars/all/azure.yml
+        inventory/sample/group_vars/all/coreos.yml
+        inventory/sample/group_vars/all/docker.yml
+        inventory/sample/group_vars/all/oci.yml
+        inventory/sample/group_vars/all/openstack.yml
 
 [wheel]
 universal = 1