Cargo.toml: fixed categories & added memory-management

Cargo.toml

@@ -3,7 +3,7 @@ authors = ["Jonathan Klimt <[email protected]>"]
 description = "Unified virtual and physical address types for the Hermit ecosystem and beyond"
 documentation = "https://docs.rs/memory_addresses"
 keywords = ["amd64", "x86", "x86_64", "aarch64", "no_std"]
-categories = ["no-std", "os", "no-alloc"]
+categories = ["no-std", "os", "no-std::no-alloc", "memory-management"]
 license = "MIT/Apache-2.0"
 name = "memory_addresses"
 readme = "README.md"