update CONTRIBUTORS.md

Author: tilo

CHANGELOG.md

@@ -2,7 +2,7 @@
 # SmarterCSV 1.x Change Log
 
 ## 1.12.1 (2024-07-10)
-  * Improved column separator detection by ignoring quoted sections [#276](https://github.com/tilo/smarter_csv/pull/276)
+  * Improved column separator detection by ignoring quoted sections [#276](https://github.com/tilo/smarter_csv/pull/276) (thanks to Nicolas Castellanos)
 
 ## 1.12.0 (2024-07-09)
   * Added Thread-Safety: added SmarterCSV::Reader to process CSV files in a thread-safe manner ([issue #277](https://github.com/tilo/smarter_csv/pull/277))

CONTRIBUTORS.md

@@ -53,3 +53,4 @@ A Big Thank you to everyone who filed issues, sent comments, and who contributed
  * [JP Camara](https://github.com/jpcamara)
  * [Kenton Hirowatari](https://github.com/hirowatari)
  * [Daniel Pepper](https://github.com/dpep)
+ * [Nicolas Castellanos](https://github.com/nicastelo)