Update Longhorn readme

Author: YuryHrytsuk

charts/longhorn/README.md

@@ -2,11 +2,10 @@
 
 ### How does LH decide which node's disk to use as storage
 
-> The storage tag feature enables only certain nodes or disks to be used for storing Longhorn volume data
-
-Use storage tags to control this: https://longhorn.io/docs/1.8.1/nodes-and-volumes/nodes/storage-tags/
-
-Article explaining how to use storage on specific set of nodes: https://longhorn.io/kb/tip-only-use-storage-on-a-set-of-nodes/
+There are 3 ways https://longhorn.io/kb/tip-only-use-storage-on-a-set-of-nodes/
+* storag tag feature https://longhorn.io/docs/1.8.1/nodes-and-volumes/nodes/storage-tags/
+* node selectors that will restrict LH to certain nodes only (and disks on these nodes)
+* using https://longhorn.io/docs/archives/1.2.2/references/settings/#create-default-disk-on-labeled-nodes
 
 ### Will LH pick up disks from a newly-added node