doc: add eol warning notes for macOS 10.15

Author: deepak1556

release-notes/v1_96.md

@@ -713,6 +713,10 @@ Here's a screenshot of the feature in action, note the yellow line in the gutter
 
 The issue tracking this work is [#221145](https://github.com/microsoft/vscode/issues/221145) which has frequent updates and more details on progress as it's made.
 
+### EOL warning for macOS 10.15
+
+VS Code desktop will be updating to [Electron 33](https://github.com/microsoft/vscode/issues/232993) in the next couple of milestones. With the Electron 33 update, VS Code desktop will no longer run on **macOS Catalina**. In this milestone, we have added deprecation notices for the users on this affected platform to prepare them for migration. If you are a user of the aforementioned OS version, please take a look at our [FAQ](https://code.visualstudio.com/docs/supporting/faq#_can-i-run-vs-code-on-old-macos-versions) for additional information.
+
 ## Notable fixes
 
 * [233915](https://github.com/microsoft/vscode/issues/233915) Share an extension with others by using the **Copy Link** action in the context menu of an extension in the Extensions view.