api::fxa_webhooks::change_profile_test is flaky

[caugner]

Error: strubr not ready after 200ms
thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `1`,
 right: `0`: the test returned a termination value with a non-zero status code (1) which indicates a failure', /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/test/src/lib.rs:185:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
test api::fxa_webhooks::change_profile_test ... FAILED

(Source: https://github.com/mdn/rumba/runs/7992502469?check_suite_focus=true#step:8:209)