added reference to calico_ip_auto_method in sample inventory group vars (#5612)

inventory/sample/group_vars/k8s-cluster/k8s-net-calico.yml

@@ -46,3 +46,9 @@
 
 # Set max typha connections
 # typha_max_connections_lower_limit: 300
+
+# If you want to use non default IP_AUTODETECTION_METHOD for calico node set this option to one of:
+# * can-reach=DESTINATION
+# * interface=INTERFACE-REGEX
+# see https://docs.projectcalico.org/reference/node/configuration
+# calico_ip_auto_method: "interface=eth.*"