bump xtensa rt to 0.4.0

Author: MabezDev

Cargo.toml

@@ -32,7 +32,7 @@ rt = ["esp32/rt", "xtensa-lx6-rt"]
 [dependencies]
 esp32-hal-proc-macros = { path = "procmacros" }
 
-xtensa-lx6-rt = { version = "0.3.0", optional = true }
+xtensa-lx6-rt = { version = "0.4.0", optional = true }
 xtensa-lx6 = "0.2.0"
 esp32 = { version = "0.7.0", default-features = false }
 bare-metal = "0.2"