build(deps): Bump cosmossdk.io/api from 0.3.1 to 0.4.0 in /core (#15734)

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simapp/go.mod

@@ -3,7 +3,7 @@ module cosmossdk.io/simapp
 go 1.20
 
 require (
-	cosmossdk.io/api v0.3.2-0.20230313131911-55bf5d4efbe7
+	cosmossdk.io/api v0.4.0
 	cosmossdk.io/client/v2 v2.0.0-20230309163709-87da587416ba
 	cosmossdk.io/core v0.6.1
 	cosmossdk.io/depinject v1.0.0-alpha.3