message: docs: fix README.md typo in example
  ## Motivation
  As a new user, I stumbled over a broken link and thought I'd fix it.
  Also noticed an unrelated open issue while searching for one about the
  broken link, and thought I'd fix that too.
  ## Solution
  Fix the typos.
diff: @@ -98,7 +98,7 @@ fn main() {
  // build but do not install the subscriber.
  .finish();
  - tracing::collector::with_default(collector, || {
  + tracing::collect::with_default(collector, || {
  info!("This will be logged to stdout");
  });
  info!("This will _not_ be logged to stdout");
  