message: update upgrade event desc
  Closes:
diff: @@ -106,12 +106,12 @@ Event emitted when the url used for off-chain dual attestation checking is rotat
  #### upgrade
  -TODO: description
  +Event emitted when a WriteSet transaction is committed which causes the state to be updated.
  | Name | Type | Description |
  |-----------|--------|-----------------------------|
  | type | string | Constant string "upgrade" |
  -| write_set | string | TODO: desc |
  +| write_set | string | lcs serialized writeset |
  #### newepoch
  