Update 1.21-notes.md

Match newer vanilla color sorting in UIs

doc/1.21-notes.md

@@ -107,3 +107,6 @@
     * They might be good for two crafting operations instead of one, leaving behind some kind of half-used ender air flask, which behaves similarly to ender air vials.
     * Pro: Larger ender air capacity would be consistent with the flask's larger brew capoacity.
     * Con: Probably an automation headache, since full and half-used flasks do not stack with each other and count as compeltely different items for filtering.
+* Adjust order of colored items in UIs to match vanilla sorting (which is different from the order in `DyeColor`)
+ * Item order in creative inventory for flowers, petals, etc.
+ * Storage order in flower pouch (needs data fixer to migrate to item components anyway)