Update release notes

Author: jedelbo

CHANGELOG.md

@@ -1,3 +1,26 @@
+# NEXT MAJOR RELEASE
+
+### Enhancements
+* <New feature description> (PR [#????](https://github.com/realm/realm-core/pull/????))
+* Storage of integers changed so that they take up less space in the file. This can cause commits and some queries to take a bit longer (PR [#7668](https://github.com/realm/realm-core/pull/7668))
+
+### Fixed
+* <How do the end-user experience this issue? what was the impact?> ([#????](https://github.com/realm/realm-core/issues/????), since v?.?.?)
+* None.
+
+### Breaking changes
+* None.
+
+### Compatibility
+* Fileformat: Generates files with format v24. Reads and automatically upgrade from fileformat v10. If you want to upgrade from an earlier file format version you will have to use RealmCore v13.x.y or earlier.
+
+-----------
+
+### Internals
+* None.
+
+----------------------------------------------
+
 # 14.10.0 Release notes
 
 ### Enhancements