Fix typo in doc values docs
Fix typo in doc values docs

This commit backports commit 5b2ded5c961ee332c91fc514fc6496f31a4e53c0
from master to 2.x.

Relates #16067

strapdata/elassandra-test,strapdata/elassandra-test,strapdata/elassandra-test,strapdata/elassandra-test,strapdata/elassandra-test,strapdata/elassandra-test,strapdata/elassandra-test