Ontime v2.0.2

Small fixes from v2 feedback,

We have updated the import fields for excel and updated the documentation
We have also increased the update rate of the timers in backend. The user should see no difference, but integrations will be more responsive

What's Changed

• refactor: increase update rate by @cpvalente in #430
• refactor: update import fields by @cpvalente in #433

Full Changelog: v2.0.0...v2.0.2