README.MD code example incorrect - nonexistent keyword "Q" being passed to constructor of SEIRSNetworkModel

[randomdavis]

The current README.MD on master (commit 63dcba1) contains an example code block in the Code Usage section:

https://github.com/ryansmcgee/seirsplus#code-usage

One of the arguments being passed to SEIRSNetworkModel() in that example code is "Q", which does not exist in the current version of SEIRSNetworkModel, hence leading to errors if a user were to try to run the code straight from that example.

I do not use this library but I found this issue via a StackOverflow user that had this problem: https://stackoverflow.com/questions/73872826/unexpected-keyword-argument-within-init