UnleashClient.disable_registration isn't documented on the docs

[CaueP]

Describe the bug
I was reading the docs of UnleashClient and noticed that the disable_registration parameter doesn't have a description (code reference). What does it do?

To Reproduce
Steps to reproduce the behavior:

1. Go to the docs (https://docs.getunleash.io/unleash-client-python/unleashclient.html) or code
2. Search for disable_registration parameter
3. You'll see it's only on the class signature, but not on the parameters descriptions

Expected behavior
I expected to see a description of what it does on the description page.

[ivanklee86]

Whoops! There's actually a PR for fixing the docstring. (I need to see why unit tests are being cranky.)

disable_registration sends metadata to the Unleash server on Unleash Client startup. The main use case is Gitlab's Unleash integration which doesn't support registration.