remove duplicate changelog (#145)

Author: damianjachyra

CHANGELOG.md

@@ -13,19 +13,6 @@
 
 ---
 
-# v2.8.1 (Thu Oct 02 2025)
-
-#### 🐛 Bug Fix
-
-- Add missing Content-Type header to POST requests to fix 422 errors ([@damianjachyra](https://github.com/damianjachyra))
-- Fix header casing from X-Magic-Secret-key to X-Magic-Secret-Key ([@damianjachyra](https://github.com/damianjachyra))
-
-#### Authors: 1
-
-- Damian Jachyra ([@damianjachyra](https://github.com/damianjachyra))
-
----
-
 # v2.8.0 (Fri Sep 12 2025)
 
 #### 🚀 Enhancement