Bump github.com/DataDog/zstd to v1.5.6

Bump github.com/DataDog/zstd to v1.5.6.

Signed-off-by: David Enyeart <enyeart@us.ibm.com>

go.mod

@@ -54,7 +54,7 @@ require (
 
 require (
 	github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect
-	github.com/DataDog/zstd v1.4.5 // indirect
+	github.com/DataDog/zstd v1.5.6 // indirect
 	github.com/IBM/idemix/bccsp/schemes/aries v0.0.0-20231003085036-c4470b87b2d6 // indirect
 	github.com/IBM/idemix/bccsp/schemes/weak-bb v0.0.0-20240125153755-b3fcea5c7863 // indirect
 	github.com/IBM/idemix/bccsp/types v0.0.0-20240125153755-b3fcea5c7863 // indirect

go.sum

@@ -40,8 +40,8 @@ github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOEl
 github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/DataDog/zstd v1.4.5 h1:EndNeuB0l9syBZhut0wns3gV1hL8zX8LIu6ZiVHWLIQ=
-github.com/DataDog/zstd v1.4.5/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
+github.com/DataDog/zstd v1.5.6 h1:LbEglqepa/ipmmQJUDnSsfvA8e8IStVcGaFWDuxvGOY=
+github.com/DataDog/zstd v1.5.6/go.mod h1:g4AWEaM3yOg3HYfnJ3YIawPnVdXJh9QME85blwSAmyw=
 github.com/IBM/idemix v0.0.2-0.20231011101252-a4feda90f3f7 h1:ybW6FaLCYGEF03XaR+WJP7bq7XqeBI4Pfj8uKipQT+A=
 github.com/IBM/idemix v0.0.2-0.20231011101252-a4feda90f3f7/go.mod h1:74yugcANjVAC9e8wHDmTDvlKHxnPj0V1L9VJ84ExaoU=
 github.com/IBM/idemix/bccsp/schemes/aries v0.0.0-20231003085036-c4470b87b2d6 h1:vz8YaZRqrdZMeTi6EuIQmtWqhmb6eUxKIJQsWQYAIG8=