Add news entry

Author: schloerke

NEWS.md

@@ -2,6 +2,8 @@
 
 * Color palette improvements. All color palette functions now support all `{viridisLite}` palettes ("magma", "inferno", "plasma", "viridis", "cividis", "rocket", "mako", and "turbo") (@jack-davison, #924).
 
+* Updated vignettes to replace `{sp}`/`{raster}` usage with `{sf}`/`{terra} and their corresponding examples. (@jack-davison, #928)
+
 # leaflet 2.2.2
 
 * Fixed #893: Correctly call `terra::crs()` when checking the CRS of a `SpatVector` object in `pointData()` or `polygonData()` (thanks @mkoohafkan, #894).