jmt: bump [email protected] (#120)

Author: SuperFluffy

Cargo.toml

@@ -38,7 +38,7 @@ sha2 = { version = "0.10", optional = true }
 blake3 = { version = "1.4.0", optional = true, features = ["traits-preview"] } 
 hex = "0.4"
 tracing = "0.1"
-ics23 = { version = "0.11.0", optional = true}
+ics23 = { version = "0.12.0", optional = true}
 
 [dev-dependencies]
 hex = { version = "0.4", features = ["serde"] }