fix(deps): update module github.com/crossplane/function-sdk-go to v0.4.0

Author: renovate[bot]

go.mod

@@ -7,7 +7,7 @@ toolchain go1.21.3
 require (
 	github.com/alecthomas/kong v0.9.0
 	github.com/crossplane/crossplane-runtime v1.14.4
-	github.com/crossplane/function-sdk-go v0.1.0
+	github.com/crossplane/function-sdk-go v0.4.0
 	github.com/google/go-cmp v0.6.0
 	google.golang.org/protobuf v1.32.0
 	k8s.io/apimachinery v0.29.1