properties.msgpack.lock is not deleted after changing the file

[lucarin91]

Describe the problem

The properties.msgpack.lock should protect properties.msgpack only during read/write operations, instead seems that the lock file remain there indefinitivelly after the first access.

To reproduce

rm .local/share/arduino-app-cli/properties.msgpack.lock
curl http://localhost:8800/v1/properties/asd
file .local/share/arduino-app-cli/properties.msgpack.lock

Expected behavior

I would expect that the file was removed after the request ends

Arduino App CLI version

0.6.8

Additional context

No response

Issue checklist

• I searched for previous reports in the issue tracker
• I verified the problem still occurs when using the latest version
• My report contains all necessary details