Update CONTRIBUTORS.md

Author: guoyuanplct

CONTRIBUTORS.md

@@ -250,7 +250,7 @@ In chronological order:
 
 * Ye Tao <ye.tao@arm.com>
   * [2025-02-03] Optimize SBGEMM kernel on NEOVERSEV1
-  * [2025-02-27] Add sbgemv_n_neon kernel2
+  * [2025-02-27] Add sbgemv_n_neon kernel
 
 * Abhishek Kumar <https://github.com/abhishek-iitmadras>
   * [2025-04-22] Optimise dot kernel for NEOVERSE V1