docs: Fix a few typos

[timgates42]

There are small typos in:

• autobahn/main.py
• autobahn/websocket/protocol.py
• examples/twisted/wamp/component/backend.py

Fixes:

• Should read trackbacks rather than tracbacks.
• Should read indicate rather than idicate.
• Should read incomplete rather than uncomplete.

Semi-automated pull request generated by https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md

[oberstet]

Thanks!

no idea why flake8 was failing in the CI .. just restarted to retry. let's see ..

[oberstet]

ok, the problem is flake8 version 5, which newly complains about assert(..). I'll fix that later, merging this one!