sql: use consistent spelling for 'SET TIME ZONE' in command tag
sql: use consistent spelling for 'SET TIME ZONE' in command tag

Update the tag for the 'SET TIME ZONE' command to be consistent with the
command itself (i.e., "time zone", not "timezone").

vaibhavarora/cockroach,maxlang/cockroach,paperstreet/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,paperstreet/cockroach,maxlang/cockroach,maxlang/cockroach,maxlang/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,paperstreet/cockroach,maxlang/cockroach,paperstreet/cockroach,maxlang/cockroach,vaibhavarora/cockroach,maxlang/cockroach,maxlang/cockroach,paperstreet/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach