[release] Add 2.10.1 to entry to the changelog

Change-Id: I0553aec9718ef549ed02442e09e3339e097eb9a8

Author: athomas

CHANGELOG.md

@@ -1,4 +1,16 @@
-## 2.10.0
+## 2.10.1 - 2020-10-06
+
+This is a patch release that fixes the following issues:
+* crashes when developing Flutter applications (issue [#43464][]).
+* non-deterministicall weird program behaviour and/or crashes (issue
+  [flutter/flutter#66672][]).
+* uncaught TypeErrors in DDC (issue [#43661][]).
+
+[#43464]: https://github.com/dart-lang/sdk/issues/43464
+[flutter/flutter#66672]: https://github.com/flutter/flutter/issues/66672
+[#43661]: https://github.com/dart-lang/sdk/issues/43661
+
+## 2.10.0 - 2020-09-28
 
 ### Core libraries
 
@@ -36,7 +48,7 @@
     deferred loading of types, pass `--no-defer-class-types`. See the original
     post on the [unsoundness in the deferred loading algorithm][].
 *   Enables a new sound deferred splitting algorithm. To explicitly disable
-    the new deferred splitting algorithm, pass `--no-new-deferred-split'.
+    the new deferred splitting algorithm, pass `--no-new-deferred-split`.
     See the original post on the
     [unsoundness in the deferred loading algorithm][].