N1QL docs mistakenly state underscores in indexes require backtics

This statement is not correct as it states that underscores must have back-tics, but really it should be hyphens that require back-tics:

When querying, if the index name contains a # or _ character, you must enclose the index name within back-tics.

https://docs.couchbase.com/server/current/n1ql/n1ql-language-reference/createindex.html#syntax