[ruby/timeout] Improve Timeout.timeout documentation formatting and typosHEADmaster

This commit makes a few minor improvements to the documentation of the `Timeout.timeout` method.
The changes include fixing typos and enhancing formatting for better readability.

We can see the latest version of the documentation here:
https://docs.ruby-lang.org/en/master/Timeout.html#method-c-timeout

Also, we can verify this change locally by running:

```shell
rdoc
open doc/Timeout.html
```

https://github.com/ruby/timeout/commit/53ee559e15

0 files changed, 0 insertions, 0 deletions