Fix warning use of deprecated associated function `chrono::NaiveDateTime::from_timestamp_micros`

[fzyzcjy]

Changes

Close #1886

Checklist

• [ ] An issue to be fixed by this PR is listed above.
• [ ] New tests are added to ensure new features are working. Please refer to this page to see how to add a test.
• [ ] ./frb_internal precommit --mode slow (or fast) is run (it internal runs code generator, does auto formatting, etc).
• [ ] If this PR adds/changes features, documentations (in the ./website folder) are updated.
• [ ] CI is passing. Please refer to this page to see how to solve a failed CI.

Remark for PR creator

• ./frb_internal --help shows utilities for development.
• If fzyzcjy does not reply for a few days, maybe he just did not see it, so please ping him.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 89.35%. Comparing base (e1f4e76) to head (cf7be66).

:exclamation: Current head cf7be66 differs from pull request most recent head 713e0db

Please upload reports for the commit 713e0db to get more accurate results.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1941 +/- ## ========================================== - Coverage 99.22% 89.35% -9.87% ========================================== Files 369 364 -5 Lines 15752 14123 -1629 ========================================== - Hits 15630 12620 -3010 - Misses 122 1503 +1381 ```

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