Promote https (#8160)

* Promote https in extensions.json
* Promote https in code-of-conduct

.vscode/extensions.json

@@ -1,5 +1,5 @@
 {
-  // See http://go.microsoft.com/fwlink/?LinkId=827846
+  // See https://go.microsoft.com/fwlink/?LinkId=827846
   // for the documentation about the extensions.json format
   "recommendations": [
     "ms-vscode.cpptools",

CODE_OF_CONDUCT.md

@@ -3,6 +3,6 @@
 This project has adopted the [Microsoft Open Source Code of Conduct][conduct-code].
 For more information see the [Code of Conduct FAQ][conduct-FAQ] or contact [opencode@microsoft.com][conduct-email] with any additional questions or comments.
 
-[conduct-code]: http://opensource.microsoft.com/codeofconduct/
-[conduct-FAQ]: http://opensource.microsoft.com/codeofconduct/faq/
+[conduct-code]: https://opensource.microsoft.com/codeofconduct/
+[conduct-FAQ]: https://opensource.microsoft.com/codeofconduct/faq/
 [conduct-email]: mailto:opencode@microsoft.com