Update version constraint to allow the latest `poetry-core` `1.9.1` (#17902)

Update version constraint to allow the latest `poetry-core` `1.9.1`

Context:

> I am working on updating poetry-core in Fedora and synapse is one of
affected packages. Please run a CI to see if it works properly. Thank
you.

Mergeable version of https://github.com/element-hq/synapse/pull/17848