update Python Sentry integration

[rahulbot]

Sentry sent me an email saying we are using an old version. They pointed to docs to help and this code:

import sentry_sdk
sentry_sdk.init("your DSN",
    # Set traces_sample_rate to 1.0 to capture 100%
    # of transactions for performance monitoring.
    # We recommend adjusting this value in production.
    traces_sample_rate=1.0,
)

So it looks like upgrading may not be a hard task. It didn't indicate any impending deprecation, but I marked this as a bug because there might be.