[bug] Weight API: `lastupdateTime` is not updated on update

[cyroxx]

Steps to reproduce

1. Update an existing weight record.

Expected behavior

lastupdateTime should reflect the point in time of the update.

Actual behavior

lastupdateTime still has the same value as of the creation of the record, i.e. insertTime == lastupdateTime.

Health app version

2.2.2

Additional info

No response