Update changelog with changes from v2.26.0

Author: newrelic-coreint-bot

CHANGELOG.md

@@ -9,9 +9,14 @@ Unreleased section should follow [Release Toolkit](https://github.com/newrelic/r
 
 ## Unreleased
 
-### Enhancements
+## v2.26.0 - 2026-01-20
+
+### 🚀 Enhancements
 - Added SQL Server 2016 support for Query Performance Monitoring when using DMV-only mode (QUERY_MONITORING_DISABLE_HISTORICAL_INFORMATION=true)
 
+### ⛓️ Dependencies
+- Updated github.com/microsoft/go-mssqldb to v1.9.6 - [Changelog 🔗](https://github.com/microsoft/go-mssqldb/releases/tag/v1.9.6)
+
 ## v2.25.2 - 2025-12-09
 
 ### ⛓️ Dependencies