Add issue template and other fixes

.github/ISSUE_TEMPLATE/pub_semver.md

diff --git a/.github/ISSUE_TEMPLATE/pub_semver.md b/.github/ISSUE_TEMPLATE/pub_semver.md
new file mode 100644
index 0000000..c7db9b5
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/pub_semver.md
@@ -0,0 +1,5 @@
+---
+name: "package:pub_semver"
+about: "Create a bug or file a feature request against package:pub_semver."
+labels: "package:pub_semver"
+---
\ No newline at end of file

pkgs/pub_semver/pubspec.yaml

diff --git a/pkgs/pub_semver/pubspec.yaml b/pkgs/pub_semver/pubspec.yaml
index 5a061be..192de00 100644
--- a/pkgs/pub_semver/pubspec.yaml
+++ b/pkgs/pub_semver/pubspec.yaml
@@ -3,7 +3,7 @@
 description: >-
  Versions and version constraints implementing pub's versioning policy. This
  is very similar to vanilla semver, with a few corner cases.
-repository: https://github.com/dart-lang/pub_semver
+repository: https://github.com/dart-lang/tools/tree/main/pkgs/pub_semver
 topics:
  - dart-pub
  - semver