Update Rust crate tokio to 1.50.0 (#29)

Co-authored-by: oxide-renovate[bot] <146848827+oxide-renovate[bot]@users.noreply.github.com>

Author: oxide-renovate[bot]

dlpi/Cargo.toml

@@ -12,5 +12,5 @@ libc = "0.2"
 thiserror = "2.0"
 num_enum = "0.7"
 pretty-hex = "0.4"
-tokio = { version = "1.49.0", features = ["full"], optional = true }
+tokio = { version = "1.50.0", features = ["full"], optional = true }
 libdlpi-sys = { path = "../libdlpi-sys" }