fix: hex trust link

Author: kevin

docs/guides/btc_stakers/native_staking/custody_support.mdx

@@ -17,8 +17,7 @@ Here is a list of custodial services that support Babylon Bitcoin staking:
 | Chainup Custody | https://chainup.com/ |
 | Ceffu | https://www.ceffu.com/ |
 | Cobo | https://cobo.com/ |
-| Hex Trust | https://hex.trust/ |
-| Pivital | https://pivital.io/ |
+| Hex Trust | https://www.hextrust.com/ |
 
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