Wrong index in ODE_SEIR model

[kilianvolmer]

Bug description

In https://github.com/SciCompMod/memilio/blob/main/cpp/models/ode_seir/model.h#L83 the index j instead of i should be used.

Version

Any

To reproduce

Run an ODE_SEIR model with more than one age group.

Relevant log output

No response

Add any relevant information, e.g. used compiler, screenshots.

No response

Checklist

• Attached labels, especially loc:: or model:: labels.
• Linked to project