Add changelog entries for recent work

CHANGELOG.md

@@ -3,15 +3,26 @@
 ## Unreleased
 
 - Components
+    - General
+        - Remove YokeTraitHack from icu (unicode-org#6126)
+        - Many crates have been given the ability to be built without `alloc` (unicode-org#6077, unicode-org#6078)
     - `icu_provider`
         - `GeneralCategoryGroup::contains` now accepts `self` by value (unicode-org#5952)
+        - There is now a `data_marker!` macro (unicode-org#6072)
     - `icu_locale`
         - `LocaleExpander`, `LocaleDirectionality`, and `LocaleCanonicalizer` distinguish between `new_common()` and `new_extended()` constructors (unicode-org#5958)
     - `icu_segmenter`
         - Segmenters that can take a content locale now specify `_root()` on their default localeless constructors (unicode-org#5958)
+    - `icu_calendar`
+        - Rename IsoWeekday to Weekday (unicode-org#6140)
+    - `icu_properties`
+        - Add to/from ICU4C APIs to enumerated properties (unicode-org#6091)
 - Utils
     - `zerovec`
         - derive: Reduce number of panicky calls introduced by derive (unicode-org#6052)
+    - `fixed_decimal`
+        - Rename `UnsignedFixedDecimal` to `UnsignedDecimal`, `SignedFixedDecimal` to `Decimal` (unicode-org#6143, unicode-org#6146)
+
 ## icu4x 2.0-beta1
 
 - Components