fix(deps): update module github.com/modelcontextprotocol/go-sdk to v0.4.0 (#52)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/google/jsonschema-go v0.2.1-0.20250828145618-7d3a7746ff83
 	github.com/lestrrat-go/httprc/v3 v3.0.1
 	github.com/lestrrat-go/jwx/v3 v3.0.10
-	github.com/modelcontextprotocol/go-sdk v0.3.1
+	github.com/modelcontextprotocol/go-sdk v0.4.0
 	github.com/opencontainers/go-digest v1.0.0
 	github.com/sourcegraph/jsonrpc2 v0.2.1
 	github.com/spf13/cobra v1.10.1

go.sum

@@ -55,6 +55,8 @@ github.com/modelcontextprotocol/go-sdk v0.3.0 h1:/1XC6+PpdKfE4CuFJz8/goo0An31bu8
 github.com/modelcontextprotocol/go-sdk v0.3.0/go.mod h1:71VUZVa8LL6WARvSgLJ7DMpDWSeomT4uBv8g97mGBvo=
 github.com/modelcontextprotocol/go-sdk v0.3.1 h1:0z04yIPlSwTluuelCBaL+wUag4YeflIU2Fr4Icb7M+o=
 github.com/modelcontextprotocol/go-sdk v0.3.1/go.mod h1:whv0wHnsTphwq7CTiKYHkLtwLC06WMoY2KpO+RB9yXQ=
+github.com/modelcontextprotocol/go-sdk v0.4.0 h1:RJ6kFlneHqzTKPzlQqiunrz9nbudSZcYLmLHLsokfoU=
+github.com/modelcontextprotocol/go-sdk v0.4.0/go.mod h1:whv0wHnsTphwq7CTiKYHkLtwLC06WMoY2KpO+RB9yXQ=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=