Add Copilot Chat issue link

Author: ntrogh

release-notes/v1_105.md

@@ -13,7 +13,7 @@ _Release date: October 9, 2025_
 
 **Security update**: The following extension has security updates: [GitHub.copilot-chat](https://marketplace.visualstudio.com/items?itemName=GitHub.copilot-chat).
 
-**Update 1.105.1**: The update addresses these [issues](https://github.com/microsoft/vscode/issues?q=is%3Aissue+is%3Aclosed+milestone%3A%22September+2025+Recovery+1%22+).
+**Update 1.105.1**: The update addresses these [issues in core](https://github.com/microsoft/vscode/issues?q=is%3Aissue+is%3Aclosed+milestone%3A%22September+2025+Recovery+1%22+) and these issues in the [GitHub Copilot Chat extension](https://github.com/microsoft/vscode/issues?q=is%3Aissue%20is%3Aclosed%20milestone%3A%22September%202025%20Chat%20Recovery%202%22).
 
 <!-- DOWNLOAD_LINKS_PLACEHOLDER -->