There's two things going on here.

First, deploys are now being cancelled, as a result of PR #100074. 👍

We can see that from the comment ("Deploy Preview for python-cpython-preview canceled"), the status checks ("Deploy canceled") and the logs:

3:05:11 PM: Detected ignore command in Netlify configuration file. Proceeding with the specified command: 'git diff --quiet $CACHED_COMMIT_REF $COMMIT_REF . ../netlify.toml'
3:05:11 PM: User-specified ignore command returned exit code 0. Returning early from build.
3:05:11 PM: Creating deploy upload records
3:05:11 PM: Failed during stage 'checking build content for changes': Canceled build due to no content change

Second, the deploy notifications need to be turned off. I think this can only be done in the admin settings on Netlify, rather than config, and only one person currently has access, but hopefully we'll get more soon.