[release] Add changelog for 2.18.2

Change-Id: I47ae13f80780c57419e252431c429fbb040db599
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/260104
Reviewed-by: Michael Thomsen <mit@google.com>

CHANGELOG.md

@@ -49,15 +49,6 @@
 [#34233]: https://github.com/dart-lang/sdk/issues/34233
 [`DEFAULT_BUFFER_SIZE`]: https://api.dart.dev/stable/2.17.6/dart-convert/JsonUtf8Encoder/DEFAULT_BUFFER_SIZE-constant.html
 
-#### `dart:core`
-
-- The `Uri` class will parse a backslash in the path or the authority separator
-  of a URI as a forward slash. This affects the `Uri` constructor's `path`
-  parameter, and the `Uri.parse` method.
-  This change was made to not diverge as much from the browser `URL` behavior.
-  The Dart `Uri` class is still not an implementation of the same standard
-  as the browser's `URL` implementation.
-
 #### `dart:developer`
 
 - **Breaking change** [#34233][]: The previously deprecated APIs
@@ -159,6 +150,21 @@ Updated the Linter to `1.28.0`, which includes changes that
 - **Breaking change** [49473](https://github.com/dart-lang/sdk/issues/49473):
   dart2js no longer supports HTTP URIs as inputs.
 
+## 2.18.2 - 2022-09-28
+
+This is a patch release that fixes incorrect behavior in `Uri.parse`.
+
+### Libraries
+
+#### `dart:core`
+
+- The `Uri` class will parse a backslash in the path or the authority separator
+  of a URI as a forward slash. This affects the `Uri` constructor's `path`
+  parameter, and the `Uri.parse` method.
+  This change was made to not diverge as much from the browser `URL` behavior.
+  The Dart `Uri` class is still not an implementation of the same standard
+  as the browser's `URL` implementation.
+
 ## 2.18.1 - 2022-09-14
 
 This is a patch release that fixes a crash caused by incorrect type inference