Auto merge of #12510 - chenpighead:update-mozlog, r=metajack

Upgrade mozlog package from 3.0 to 3.3.

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Update mozlog to 3.3 so we can have correct reftest screenshots displayed with --log-html.
The original mozlog update bugs are listed as follows:
https://bugzilla.mozilla.org/show_bug.cgi?id=1287019
https://bugzilla.mozilla.org/show_bug.cgi?id=1287480

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #12401 and #12403 (github issue number if applicable).

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- [ ] There are tests for these changes OR
- [X] These changes do not require tests because this is just a PyPI package version bumping

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Update mozlog to 3.3.

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