message: Fixes to changelog.md
diff: ### Bugfixes
  -* Fixed a few bugs (caused crashes) in pthread library on UWP.
  * Fixes a bug in chuncked binary column returning null value.
  Issue [#2418](https://github.com/realm/realm-core/pull/2418).
  * Possibly fixed some cases of extreme file size growth, by preventing starvation
  version. [#2395](https://github.com/realm/realm-core/pull/2395)
  * Fixed a bug when deleting a column used in a query [#2408](https://github.com/realm/realm-core/pull/2408)
  * Fixed a crash that occurred if you tried to override a binary with a size close
  - to the limit.
  + to the limit. [#2416](https://github.com/realm/realm-core/pull/2416)
  * `seekpos()` and `seekoff()` in `realm::util::MemoryInputStreambuf` now behave
  - correctly when argument is out of range.
  + correctly when argument is out of range. [#2472](https://github.com/realm/realm-core/pull/2472)
  ### Breaking changes
  