add Padawan point to GHPR notes

Author: alexr00

release-notes/v1_100.md

@@ -439,6 +439,7 @@ There has been more progress on the [GitHub Pull Requests](https://marketplace.v
 * Ask Copilot questions about the active pull request, such as "Address all comments in the #activePullRequest".
 * View issues in a webview, just like you can view pull requests.
 * Polish and alignment of the "Pull Requests", "Issues", and "Notifications" views.
+* Prepared for the release of GitHub's Project Padawan by enabling assignment of issues to Copilot, @-mentioning of Copilot, and ensuring it will be displayed properly in the UI.
 
 Review the [changelog for the 0.110.0](https://github.com/microsoft/vscode-pull-request-github/blob/main/CHANGELOG.md#0110) release of the extension to learn about the other highlights.