message: Fix dates in changelog
diff: @@ -10,7 +10,7 @@ is based on [Keep a Changelog](https://keepachangelog.com).
  - The new classes `json_value`, `json_array` and `json_object` allow working
  with JSON inputs directly. Actors can also pass around JSON values safely.
  -## [0.19.0-rc.1] - 2020-10-31
  +## [0.19.0-rc.1] - 2022-10-31
  ### Added
  @@ -92,7 +92,7 @@ is based on [Keep a Changelog](https://keepachangelog.com).
  code base. Since fixing `caf::variant` does not seem to be worth the time
  investment, we remove this type without a deprecation cycle.
  -## [0.18.6]
  +## [0.18.6] - 2022-03-24
  ### Added
  