Remove 'f' prefix on SkRuntimeEffect::Varying struct

Change-Id: I10184e60617f65a513980e5389f226f2ebe3eb46
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/365656
Reviewed-by: John Stiles <johnstiles@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index 077e33e..bb9ceed 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -27,6 +27,9 @@
     instead of a tuple.
     https://review.skia.org/363785
 
+  * Changed SkRuntimeEffect::Varying to have lower-case member names, with no 'f' prefix.
+    https://review.skia.org/365656
+
   * Deprecate (and ignore) SkAndroidCodec::ExifOrientation
     https://review.skia.org/344763