Add a doc reference that helps identify the possible values for Logger :translator_inspect_opts

[satom99]

I came across the Logger runtime config param :translator_inspect_opts and there is no mention in the docs of what are the allowed options. I had to look through the source code to figure out that these options are later passed to a call to Kernel.inspect/2.

This PR helps remediate that by adding a reference to the docs for Kernel.inspect/2 in the documentation of the runtime config param :translator_inspect_opts. We could link to the Inspect.Opts module directly perhaps, but I figured that this can be a problem if for any reason the Kernel.inspect/2 function changes its spec at some point, and/or the options are moved elsewhere.

[josevalim]

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