Update documentation on Starlette website

[antonpirker]

Problem Statement

Tom Christie (creator of Starlette) suggested, that we submit a PR for updating their documentation.

See this discussion: https://github.com/encode/starlette/discussions/1787#discussioncomment-3314878

Solution Brainstorm

Create two PRs, one for each suggested topic by Tom. Link back to the Starlette guide on Sentry: https://docs.sentry.io/platforms/python/guides/starlette/