Updated Reference and revision history files (google#540)

Author: Sergiodero

gtfs/spec/en/reference.md

@@ -1,6 +1,6 @@
 ## General Transit Feed Specification Reference
 
-**Revised Jan 23, 2025. See [Revision History](https://gtfs.org/schedule/process/#revision-history) for more details.**
+**Revised Feb 24, 2025. See [Revision History](https://gtfs.org/schedule/process/#revision-history) for more details.**
 
 This document defines the format and structure of the files that comprise a GTFS dataset.
 

gtfs/spec/en/revision-history.md

@@ -1,5 +1,8 @@
 ### Revision History
 
+#### February 2025
+* Added rider_categories.txt. See [discussion](https://github.com/google/transit/pull/511).
+
 #### January 2025
 * Update agency_fare_url to expand its description and include fare information only. See [discussion](https://github.com/google/transit/pull/524).