Fix cargo clippy issue

central_backend/Cargo.lock

@@ -2414,9 +2414,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.137"
+version = "1.0.135"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "930cfb6e6abf99298aaad7d29abbef7a9999a9a8806a40088f55f0dcec03146b"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
 dependencies = [
  "itoa",
  "memchr",

central_backend/src/logs/logs_manager.rs

@@ -35,7 +35,7 @@ pub fn save_log(
         .as_bytes(),
     )?;
     file.flush()?;
-    file.unlock()?;
+    fs4::fs_std::FileExt::unlock(&file)?;
 
     Ok(())
 }