fix(deps): update rust crate volatile to v0.6.1

Author: renovate[bot]

Cargo.lock

@@ -7,7 +7,7 @@ edition = "2021"
 bootloader = { version = "0.9", features = ["map_physical_memory"]}
 lazy_static = { version = "1.4.0", features = ["spin_no_std"] }
 spin = "0.5.2"
-volatile = "=0.2.6"
+volatile = "=0.6.1"
 x86_64 = "0.15.0"
 uart_16550 = "0.3.0"
 pic8259 = "0.11.0"