[easy] fix bug in Hh_logger where ms were out of sync
[easy] fix bug in Hh_logger where ms were out of sync

Summary:
Fixes a bug that causes server logs to print consecutive lines like:
```
[2021-11-11 14:43:06.999] Persistent request: lspToServer notification $/cancelRequest
[2021-11-11 14:43:06.000] Persistent response: lspFromServer None
```

Changelog: [internal]

Reviewed By: panagosg7

Differential Revision: D32564726

fbshipit-source-id: 3fc3ea5a5d7741501e309780df13a8289802d9f6

mroch/flow,facebook/flow,mroch/flow,facebook/flow,facebook/flow,mroch/flow,facebook/flow,mroch/flow,mroch/flow,facebook/flow,mroch/flow,mroch/flow,facebook/flow,facebook/flow