Update README.md: Update Discord logo (#283)

Author: nvbien2000

shorebird_code_push/README.md

@@ -1,6 +1,6 @@
 # Shorebird Code Push
 
-[![Discord](https://dcbadge.vercel.app/api/server/shorebird)](https://discord.gg/shorebird)
+[![Discord](https://img.shields.io/discord/1030243211995791380?style=for-the-badge&logo=discord&color=blue)](https://discord.gg/shorebird)
 
 [![ci](https://github.com/shorebirdtech/updater/actions/workflows/main.yaml/badge.svg)](https://github.com/shorebirdtech/updater/actions/workflows/main.yaml)
 [![codecov](https://codecov.io/gh/shorebirdtech/updater/branch/main/graph/badge.svg)](https://codecov.io/gh/shorebirdtech/updater)