add changelog entry

Author: mtrezza

CHANGELOG.md

@@ -95,6 +95,7 @@ ___
 - Added Parse Server Security Check to report weak security settings (Manuel Trezza, dblythy) [#7247](https://github.com/parse-community/parse-server/issues/7247)
 - EXPERIMENTAL: Added new page router with placeholder rendering and localization of custom and feature pages such as password reset and email verification (Manuel Trezza) [#6891](https://github.com/parse-community/parse-server/issues/6891)
 - EXPERIMENTAL: Added custom routes to easily customize flows for password reset, email verification or build entirely new flows (Manuel Trezza) [#7231](https://github.com/parse-community/parse-server/issues/7231)
+- Remove support for MongoDB 3.6 which has reached its End-of-Life support date (Manuel Trezza) [#7315](https://github.com/parse-community/parse-server/pull/7315)
 ### Other Changes
 - Fix error when a not yet inserted job is updated (Antonio Davi Macedo Coelho de Castro) [#7196](https://github.com/parse-community/parse-server/pull/7196)
 - request.context for afterFind triggers (dblythy) [#7078](https://github.com/parse-community/parse-server/pull/7078)