fix multiLogger data race

[yzqzss]

fix a data race found in #444.

---

Although this is a data race, it only occurs when the log component is shutting down, which is the last component to be shut down, so this bug does not actually affect Zeno's data integrity.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 55.45%. Comparing base (c8a6c40) to head (144aadc).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #446      +/-   ##
==========================================
+ Coverage   54.69%   55.45%   +0.76%     
==========================================
  Files         120      120              
  Lines        7345     7364      +19     
==========================================
+ Hits         4017     4084      +67     
+ Misses       3004     2956      -48     
  Partials      324      324              

Flag	Coverage Δ
e2etests	37.17% <36.84%> (-0.01%)	⬇️
unittests	31.91% <100.00%> (+1.02%)	⬆️

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[NGTmeaty]

Thank you!