Update web/db.py

Fix typo.

web/db.py

@@ -790,7 +790,7 @@ def _get_insert_default_values_query(self, table):
 
     def multiple_insert(self, tablename, values, seqname=None, _test=False):
         """
-        Inserts multiple rows into `tablename`. The `values` must be a list of dictioanries, 
+        Inserts multiple rows into `tablename`. The `values` must be a list of dictionaries, 
         one for each row to be inserted, each with the same set of keys.
         Returns the list of ids of the inserted rows.        
         Set `seqname` to the ID if it's not the default, or to `False`