message: Added ZSTD support in CHANGELOG
diff: -Unreleased
  +Tantivy 0.18
  ================================
  - For date values `chrono` has been replaced with `time` (@uklotzde) #1304 :
  - The `time` crate is re-exported as `tantivy::time` instead of `tantivy::chrono`.
  @@ -11,6 +11,7 @@ Unreleased
  - Add [histogram](https://github.com/quickwit-oss/tantivy/pull/1306) aggregation (@PSeitz)
  - Add support for fastfield on text fields (@PSeitz)
  - Add terms aggregation (@PSeitz)
  +- Add support for zstd compression (@kryesh)
  Tantivy 0.17
  ================================
  