Adds missing entry to the Changelog

Bug: https://github.com/dart-lang/sdk/issues/51357
Bug: https://github.com/dart-lang/sdk/issues/56584

Change-Id: Idc34b808ba083dae954a23bd159ebaadf31c9ff0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/409800
Auto-Submit: Felipe Morschel <git@fmorschel.dev>
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>

CHANGELOG.md

@@ -79,6 +79,8 @@ main() {
 
 #### Analyzer
 
+- Add a new 'Go to imports' command to find the import directives that export a
+  declaration.
 - Assists and quick fixes that add an import now consider the
   `prefer_relative_imports` and `always_use_package_imports` lint rules.
 - Add a new fix that converts a `~/` operation into `/`, when the `~/`
@@ -93,6 +95,8 @@ main() {
   and with a `Flexible` widget.
 - Offer an assist to "inline" an else-block's inner if-statement with the
   else-block to read `else if`.
+- Add a fix to `use_decorated_box` by swapping the `Container` with
+  `ColoredBox` as suggested by the lint.
 - Add an additional fix to import an unknown prefixed identifier by updating
   the `show` combinator on an existing import.
 - Add a fix to import an unknown prefixed identifier by adding an