kumo-address: fixup compilation standalone

kumo-address requires tokio's net feature; previously we were
implicitly working with this because other crates in the build
provided this feature.

but, cargo nextest run -p kumo-log-types doesn't provide this.

So, add it!

crates/kumo-address/Cargo.toml

@@ -6,4 +6,4 @@ edition = "2021"
 [dependencies]
 serde.workspace = true
 thiserror.workspace = true
-tokio.workspace = true
+tokio = {workspace = true, features=["net"]}