Downgrade 'dirs' dependency

Author: yinheli

Cargo.lock

@@ -16,7 +16,7 @@ bytes = "1.5.0"
 clap = { version = "4.3.19", features = ["derive", "env", "wrap_help"] }
 dashmap = "5.5.3"
 dav-server = { version = "0.5.5", default-features = false, features = ["hyper"] }
-dirs = "6.0.0"
+dirs = "4.0.0"
 futures-util = "0.3"
 headers = "0.3.6"
 hyper = { version = "0.14.27", features = ["server", "http2"] }