Increase heart rate target coaching frequency

[HRunnerup]

Hi and thanks for a great app!

Similar to https://github.com/jonasoreland/runnerup/issues/1001, I get target feedback for the heart rate (HR) once every 40 seconds if I am out of the zone. This is too late. E.g. when running up a hill, I want to know that I have to slow down much earlier than 40 seconds in.

I have tried to change the following two settings, but they do not influence the behaviour:

• Target_pace_grace_seconds

• Target_pace_moving_average_seconds

My theory is that this is a hard coded value here: https://github.com/jonasoreland/runnerup/blob/d228c99a43586c11db5f90d6182d7c059aeba88b/app/src/main/org/runnerup/workout/TargetTrigger.java#L32-L35

I think the best solution might be to make the hard coded value dependent on the setting, cause this is also how I would have expected the setting to behave.

This issue might be a duplicate of https://github.com/jonasoreland/runnerup/issues/941?