Update sysinfo from 0.38.4 to 0.39.6

Summary:
Release notes:
https://github.com/GuillaumeGomez/sysinfo/blob/main/CHANGELOG.md

Reviewed By: 8Keep

Differential Revision: D116824961

fbshipit-source-id: 90183eb84e1971fade021322392326d17290c982

Author: David Tolnay

third-party/watchman/src/watchman/cli/Cargo.toml

@@ -16,7 +16,7 @@ duct = "0.13.7"
 jwalk = "0.8.1"
 serde = { version = "1.0.229", features = ["derive", "rc"] }
 serde_json = { version = "1.0.151", features = ["alloc", "float_roundtrip", "raw_value", "unbounded_depth"] }
-sysinfo = "0.38.4"
+sysinfo = "0.39.6"
 tabular = "0.2.0"
 tokio = { version = "1.53.1", features = ["full", "test-util", "tracing"] }
 watchman_client = { version = "0.9.0", path = "../rust/watchman_client" }