Data race on SetCurrentConfigFile call

[dido18]

Describe the problem

2025/01/10 14:35:07 stderr: WARNING: DATA RACE
2025/01/10 14:35:07 stderr: Write at 0x0000018b31e8 by goroutine 16:
2025/01/10 14:35:07 stderr: github.com/arduino/arduino-create-agent/systray.(*Systray).SetCurrentConfigFile()
2025/01/10 14:35:07 stderr: /home/dido/code/arduino/arduino-create-agent/systray/systray.go:102 +0x79d
2025/01/10 14:35:07 stderr: main.loop()
2025/01/10 14:35:07 stderr: /home/dido/code/arduino/arduino-create-agent/main.go:261 +0x791
2025/01/10 14:35:07 stderr:
2025/01/10 14:35:07 stderr: Previous write at 0x0000018b31e8 by main goroutine:
2025/01/10 14:35:07 stderr: main.main()
2025/01/10 14:35:07 stderr: /home/dido/code/arduino/arduino-create-agent/main.go:149 +0x239
2025/01/10 14:35:07 stderr:
2025/01/10 14:35:07 stderr: Goroutine 16 (running) created at:
2025/01/10 14:35:07 stderr: main.main()
2025/01/10 14:35:07 stderr: /home/dido/code/arduino/arduino-create-agent/main.go:145 +0xfa
2025/01/10 14:35:07 stderr: ==================

To reproduce

Launch the service locally with task run

Expected behavior

Do not have data race.

Arduino Create Agent version

1,6,1

Operating system

Linux

Operating system version

20.04

Browser

chroome

Browser version

chroome

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

[dido18]

A possible fix here #1012