build(deps): Bump python from 3.7-slim to 3.8.1-slim in /bot

Bumps python from 3.7-slim to 3.8.1-slim.

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

bot/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.7-slim
+FROM python:3.8.1-slim
 
 ADD tools /src/tools
 ADD bot /src/bot