fix: better naming

src/migrations/scripts/1620289895495-timestamp-format.ts

@@ -26,20 +26,20 @@ export const down = async () => {
 };
 
 function updateStructure(doc) {
-  return updateHours(doc);
+  return updateTimestamp(doc);
 }
 
 function downgradeStructure(doc) {
-  return restoreHours(doc);
+  return restoreTimestamp(doc);
 }
 
-function updateHours(doc) {
+function updateTimestamp(doc) {
   doc.createdAt = new Date(doc.createdAt).toISOString();
   doc.updatedAt = new Date(doc.updatedAt).toISOString();
   return doc;
 }
 
-function restoreHours(doc) {
+function restoreTimestamp(doc) {
   doc.createdAt = new Date(doc.createdAt).toString();
   doc.updatedAt = new Date(doc.updatedAt).toISOString();
   return doc;