Add SkImageFilters::Blend rename for Xfermode filter

This better matches SkShaders::Blend and SkColorFilters::Blend factories.

Bug: skia:9310
Change-Id: I02a3fe488a446b803df96518caacff1fdf536e9f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324623
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index a7e970d..29f7b88 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -9,6 +9,11 @@
 
   * <insert new release notes here>
 
+  * Add new SkImageFilters::Blend factory function, in place of the now deprecated
+    SkImageFilters::Xfermode factory function. Behavior is identical, but name better matches
+    conventions in SkShader and SkColorFilter.
+    https://review.skia.org/324623
+
   * SkImageFilters::Foo() factory functions now accept SkIRect, SkRect, and optional SkIRect* or
     SkRect*, instead of previously just the optional SkIRect*. Internally, the crop rects are stored
     as floats to allow for fractional crops to be defined in the local coordinate system (before