Updated changelog

Author: jordibisbal8

CHANGELOG.md

@@ -17,6 +17,7 @@ release.
   ([#1335](https://github.com/open-telemetry/opentelemetry-demo/pull/1335))
 * [ffspostgres] define and use demo specific postgres image
   ([#1338](https://github.com/open-telemetry/opentelemetry-demo/pull/1338))
+*  [loadgenerator and frontend] enable browser traffic in loadgenerator using playwright and update frontend to export the traces accordingly([#1345](https://github.com/open-telemetry/opentelemetry-demo/pull/1345))
 
 ## 1.7.2