docs: add electron 37 to 1.103 release notes (#8717)

Author: deepak1556

release-notes/v1_103.md

@@ -557,6 +557,10 @@ export async function activate(context: ExtensionContext) {
 
 `packages.microsoft.com` has updated their signing key and as a result, Linux users on newer distributions should stop seeing key-related warnings or errors while installing VS Code. Debian-based distributions automatically receive the new key, whereas users on other distributions may have to manually remove the old key before [importing the new key](https://code.visualstudio.com/docs/setup/linux#_install-vs-code-on-linux).
 
+### Electron 37 update
+
+In this milestone, we are promoting the Electron 37 update to users on our Stable release. This update comes with Chromium 138.0.7204.100 and Node.js 22.17.0. We want to thank everyone who self-hosted on Insiders builds and provided early feedback.
+
 ## Notable fixes
 
 * [vscode#252384](https://github.com/microsoft/vscode/issues/252384) - Agent Mode pauses when VS Code loses focus