[Toybox] [PATCH] timeout.test: reduce flake.

[enh]

A (presumably overloaded) CI server saw the `exit 0` test time out.
Given that several of these tests should just fail immediately,
having a huge timeout isn't even a bad thing --- if we had a bug
that caused us to report the correct status, but not until the
timeout had _also_ expired, this would make that failure glaringly
obvious.

Aren't the other tests with 0.1s timeouts potentially flaky? Yes,
obviously, but I'll worry about those if/when we see them in real
life? (Because increasing those timeouts _would_ increase overall
test time.)
---
 tests/timeout.test | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
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