Fix discord bot workflow (LAION-AI#1956)

Commits on main are failing because of a new js discord bot without
updating the container.
https://github.com/LAION-AI/Open-Assistant/commits/main

I left in the old py-bot in place for this fix, it might make sense to
use the new bot at some point.

Author: AbdBarho

docker/Dockerfile.discord-bot

@@ -1,7 +1,7 @@
 FROM python:3.10-slim-bullseye
 RUN mkdir /app
 WORKDIR /app
-COPY ./discord-bot /app
+COPY ./discord-bots/oa-bot-py /app
 COPY ./oasst-shared/oasst_shared /app/oasst_shared
 RUN pip install -r requirements.txt
 CMD ["python","-m","bot"]