update changelog

Author: vincentsarago

CHANGES.md

@@ -89,6 +89,16 @@
 * add: titiler.xarray dependency
 * add: `/zarr` endpoints
 
+## 1.2.1 (2026-03-09)
+
+### titiler.xarray
+
+* fix: allow `:` characters in xarray reader's `sel` parameter (e.g. for timestamps) (https://github.com/developmentseed/titiler/pull/1336) [Backported from 2.0.0]
+
+### titiler.mosaic
+
+* fix: `pixel-selection` method initialization to avoid FastAPI caching (author @raster-blaster, https://github.com/developmentseed/titiler/pull/1334)  [Backported from 2.0.0]
+
 ## 1.2.0 (2026-02-09)
 
 ### Input Validation