message: Add change log entry for lv locale [skip ci]
diff: @@ -140,6 +140,8 @@ for the list of changes made since `v2.0.0-alpha.1`.
  - [fi locale is updated for v2 format](https://github.com/date-fns/date-fns/pull/775). Kudos to [@sjuvonen](https://github.com/sjuvonen).
  +- [lv locale](https://github.com/date-fns/date-fns/pull/1175). Kudos to [@prudolfs](https://github.com/prudolfs).
  +
  - New locale-dependent week-numbering year helpers:
  - `getWeek`
  