Description:

Limit the state to 3 decimals as discussed in #14773.

Related issue (if applicable): fixes #14773

Pull request in home-assistant.github.io with documentation (if applicable): home-assistant/home-assistant.io#5499

Example entry for configuration.yaml (if applicable):

sensor:
  - platform: simulated
    name: Simulated relative humidity
    unit: '%'
    amplitude: 0 # Turns off the periodic contribution
    mean: 50
    spread: 10
    seed: 999

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.github.io