Update CHANGELOG.md

Author: trask

CHANGELOG.md

@@ -1,5 +1,11 @@
 # CHANGELOG
 
+# Version 2.6.1-BETA
+* Fix W3C BackCompat across multiple Application Insights instrumentation keys
+  ([#1228](https://github.com/microsoft/ApplicationInsights-Java/pull/1228))
+* Fix spring boot starter when used with `spring.main.lazy-initialization=true`
+  ([#1227](https://github.com/microsoft/ApplicationInsights-Java/pull/1227))
+
 # Version 2.6.0
 * No changes since 2.6.0-BETA.3