Bump to 7.2.3 (dart-lang/markdown#612)

pkgs/markdown/CHANGELOG.md

diff --git a/pkgs/markdown/CHANGELOG.md b/pkgs/markdown/CHANGELOG.md
index f7859d4..efb2c37 100644
--- a/pkgs/markdown/CHANGELOG.md
+++ b/pkgs/markdown/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 7.2.3
+
+* Fix an issue with checkbox list items separated with blank lines (#602).
+
 ## 7.2.2
 
 * Fix a crash parsing alert block syntax (#584).

pkgs/markdown/lib/src/version.dart

diff --git a/pkgs/markdown/lib/src/version.dart b/pkgs/markdown/lib/src/version.dart
index f10c4ff..5c4f1b4 100644
--- a/pkgs/markdown/lib/src/version.dart
+++ b/pkgs/markdown/lib/src/version.dart
@@ -1,2 +1,2 @@
 // Generated code. Do not modify.
-const packageVersion = '7.2.2';
+const packageVersion = '7.2.3';

pkgs/markdown/pubspec.yaml

diff --git a/pkgs/markdown/pubspec.yaml b/pkgs/markdown/pubspec.yaml
index 7cb8b6f..da60194 100644
--- a/pkgs/markdown/pubspec.yaml
+++ b/pkgs/markdown/pubspec.yaml
@@ -1,5 +1,5 @@
 name: markdown
-version: 7.2.2
+version: 7.2.3
 description: >-
   A portable Markdown library written in Dart that can parse Markdown into HTML.
 repository: https://github.com/dart-lang/markdown