[Mapbox Java] changelog for v6.13.0-beta.2 (#1560)

Co-authored-by: root <root@acbb8678c356>

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

CHANGELOG.md

@@ -3,8 +3,11 @@
 Mapbox welcomes participation and contributions from everyone.
 
 ### main
+
+### v6.13.0-beta.2 - July 28, 2023
 - Added `Incident#trafficCodes`.
 
+
 ### v6.13.0-beta.1 - July 11, 2023
 
 - Added `StepIntersection.mergingArea`.