Prepare a release of 7.0.2 (dart-lang/markdown#526)

pkgs/markdown/CHANGELOG.md

diff --git a/pkgs/markdown/CHANGELOG.md b/pkgs/markdown/CHANGELOG.md
index bcfa926..18bbdc6 100644
--- a/pkgs/markdown/CHANGELOG.md
+++ b/pkgs/markdown/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 7.0.2-dev
+## 7.0.2
 
 * Require Dart 2.19
 * Fix an issue in `HeaderWithIdSyntax`, do not generate heading IDs for headings

pkgs/markdown/lib/src/version.dart

diff --git a/pkgs/markdown/lib/src/version.dart b/pkgs/markdown/lib/src/version.dart
index 45fbaf7..367f402 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 = '7.0.2-dev';
+const packageVersion = '7.0.2';

pkgs/markdown/pubspec.yaml

diff --git a/pkgs/markdown/pubspec.yaml b/pkgs/markdown/pubspec.yaml
index 125f193..2f25016 100644
--- a/pkgs/markdown/pubspec.yaml
+++ b/pkgs/markdown/pubspec.yaml
@@ -1,5 +1,5 @@
 name: markdown
-version: 7.0.2-dev
+version: 7.0.2
 
 description: >-
   A portable Markdown library written in Dart that can parse Markdown into HTML.