Add issue template and other fixes

.github/ISSUE_TEMPLATE/markdown.md

diff --git a/.github/ISSUE_TEMPLATE/markdown.md b/.github/ISSUE_TEMPLATE/markdown.md
new file mode 100644
index 0000000..24e9f16
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/markdown.md
@@ -0,0 +1,5 @@
+---
+name: "package:markdown"
+about: "Create a bug or file a feature request against package:markdown."
+labels: "package:markdown"
+---
\ No newline at end of file

pkgs/markdown/pubspec.yaml

diff --git a/pkgs/markdown/pubspec.yaml b/pkgs/markdown/pubspec.yaml
index 947b66e..dba7d57 100644
--- a/pkgs/markdown/pubspec.yaml
+++ b/pkgs/markdown/pubspec.yaml
@@ -2,7 +2,7 @@
 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
+repository: https://github.com/dart-lang/tools/tree/main/pkgs/markdown
 
 topics:
  - markdown