refactor: use maps.Copy to simplify the code

[withtimezone]

Description

There is a new function added in the go1.21 standard library, which can make the code more concise and easy to read.

Fixes #(issue)

Type of change

• Code refactor or improvement

How Has This Been Tested?

• make test

Test Configuration:

• Firmware version:
• Hardware:
• Toolchain:
• SDK:

Checklist:

• [] My code follows the style guidelines of this project
• [] I have performed a self-review of my code
• [] I have commented my code, particularly in hard-to-understand areas
• [] I have made corresponding changes to the documentation
• [] My changes generate no new warnings
• [] I have added tests that prove my fix is effective or that my feature works
• [] New and existing unit tests pass locally with my changes
• [] Any dependent changes have been merged and published in downstream modules

[CLAassistant]

All committers have signed the CLA.

[withtimezone]

@CoderZhi Thanks for your review!
If there's anything need I to do, please feel free to let me know.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud