docs: update Codecov badge (#1636)

README.md

@@ -4,7 +4,7 @@ Package your [Electron](https://electronjs.org) app into OS-specific bundles (`.
 
 [![CircleCI Build Status](https://circleci.com/gh/electron/packager/tree/main.svg?style=svg)](https://circleci.com/gh/electron/packager/tree/main)
 [![electron-nightly Canary](https://github.com/electron/packager/actions/workflows/canary.yml/badge.svg)](https://github.com/electron/packager/actions/workflows/canary.yml)
-[![Coverage Status](https://codecov.io/gh/electron/electron-packager/branch/main/graph/badge.svg)](https://codecov.io/gh/electron/electron-packager)
+[![Coverage Status](https://codecov.io/gh/electron/packager/branch/main/graph/badge.svg)](https://codecov.io/gh/electron/packager)
 [![npm](https://img.shields.io/npm/v/@electron/packager.svg?style=flat)](https://npm.im/@electron/packager)
 [![Discord](https://img.shields.io/discord/745037351163527189?color=blueviolet&logo=discord)](https://discord.com/invite/APGC3k5yaH)