Fix spacing in pgDatabaseQuery

Co-authored-by: Joe Adams <github@joeadams.io> Signed-off-by: Jocelyn Thode <jocelynthode@users.noreply.github.com>

Author: jocelynthode

collector/pg_database.go

@@ -63,7 +63,7 @@ var (
 []string{"datname"}, nil,
 )
 
-pgDatabaseQuery = "SELECT pg_database.datname,pg_database.datconnlimit FROM pg_database;"
+pgDatabaseQuery = "SELECT pg_database.datname, pg_database.datconnlimit FROM pg_database;"
 pgDatabaseSizeQuery = "SELECT pg_database_size($1)"
 )