Issue with Reports if Billabe is set to non-default value

[al-lac]

Description

If I create a Report and set the Billable field to a value other than "Both" I get the following error when saving:
The properties.billable field must be true or false.

Steps To Reproduce

1. Have some time entries
2. Create a report and set the Billabe Filter to something other than "Both"
3. Save the Report
4. See the error: The properties.billable field must be true or false.

Self-hosted or Cloud?

Self-Hosted

Version of solidtime: (for self-hosted)

0.9.0

solidtime self-hosting guide: (for self-hosted)

https://docs.solidtime.io/self-hosting/guides/docker