[Mapbox Java] changelog for v6.12.0-beta.1 (#1546)

Co-authored-by: root <root@6d3d7c71e522>

Author: mapbox-github-ci-writer-public-1[bot]

CHANGELOG.md

@@ -3,8 +3,11 @@
 Mapbox welcomes participation and contributions from everyone.
 
 ### main
+
+### v6.12.0-beta.1 - May 25, 2023
 - Added `DirectionsResponse.fromJson(Reader)` and `DirectionsResponse.fromJson(Reader, RouteOptions)` to support streaming serialisation of `DirectionsResponse`.
 
+
 ### v6.11.0 - March 03, 2023
 - No additional changes