Remove note about panicking in get_field docs (#503)
Remove note about panicking in get_field docs (#503)

Since get_field rely on calling get on the underlying InnerSchema HashMap
it shouldn't fail if the field was not found, it simply returns None.
tantivy-search/tantivy,fulmicoton/tantivy,fulmicoton/tantivy,tantivy-search/tantivy,fulmicoton/tantivy