Add GitHub Copilot Chat to autopublishing list (#926)

Author: 2zqa

extensions.json

@@ -397,6 +397,10 @@
   "giscafer.leek-fund": {
     "repository": "https://github.com/giscafer/leek-fund"
   },
+  "GitHub.copilot-chat": {
+    "repository": "https://github.com/microsoft/vscode-copilot-chat",
+    "prepublish": "npm run build"
+  },
   "GitHub.github-vscode-theme": {
     "repository": "https://github.com/primer/github-vscode-theme",
     "prepublish": "npm run build"