update Changelog for 0.10

Changelog.md

 # Changelog
 
 All notable changes to this project will be documented in this file.
+## [0.10] - 2024-05-07
+- Poll netconf only once for both brian and error counters
 
 ## [0.9] - 2024-05-06
 - DBOARD3-900: Add report-interface-errors script