Fix comment typo in feat_pt_156.sql

Author: davidgamez

liquibase/changes/feat_pt_156.sql

@@ -1,5 +1,5 @@
 -- Add the new columns to gbfsfeed (if not already added)
--- No foreign keys to versions are versions are not kept between updates
+-- No foreign keys to versions as versions are not kept between updates
 ALTER TABLE gbfsfeed
   ADD COLUMN IF NOT EXISTS bounding_box geometry(Polygon, 4326);
 ALTER TABLE gbfsfeed