Downgrade env_logger for better compatibility

Author: gridbugs

src/low-level/low-level-rust/Cargo.lock

@@ -12,7 +12,7 @@ crate-type = ["staticlib"]
 [dependencies]
 anyhow = "1.0"
 cpal = "0.15"
-env_logger = "0.10"
+env_logger = "0.9" # later versions depend on rustix 0.38 which requires a later version of rust than is available on some older systems we want to support
 hound = "3.5"
 log = "0.4"
 midir = "0.9"