Add issue template and other fixes

Author: mosuem

.github/ISSUE_TEMPLATE/logging.md

@@ -0,0 +1,5 @@
+---
+name: "package:logging"
+about: "Create a bug or file a feature request against package:logging."
+labels: "package:logging"
+---

pkgs/logging/pubspec.yaml

@@ -3,7 +3,7 @@ version: 1.3.0-wip
 description: >-
   Provides APIs for debugging and error logging, similar to loggers in other
   languages, such as the Closure JS Logger and java.util.logging.Logger.
-repository: https://github.com/dart-lang/logging
+repository: https://github.com/dart-lang/core/tree/main/pkgs/logging
 
 topics:
  - logging