slip-0044: add (satoshilabs#1383)

Author: g2px1

slip-0044.md

@@ -1020,7 +1020,7 @@ Coin type | Path component (`coin_type'`) | Symbol | Coin
 989   | 0x800003dd | AIOZ   | [AIOZ](https://aioz.network)
 990   | 0x800003de |        |
 991   | 0x800003df | PEC    | [Phoenix](https://github.com/phoenixchain/phoenix)
-992   | 0x800003e0 |        |
+992   | 0x800003e0 | UNT    | [Unit](https://github.com/RebornMetaverse/Unit-reborn)
 993   | 0x800003e1 | XRB    | [X Currency](https://x-currency.org)
 994   | 0x800003e2 | QUAI   | [Quai Network](https://quai.network/)
 995   | 0x800003e3 |        |