Update Discord invite link. (#17052)

Repo-wide find-replace using the latest invite link, following
https://github.com/openxla/iree/commit/22faa158628979c14bdc6cd2b0836644e1b1ecc0
diff --git a/README.md b/README.md
index f36b396..131b414 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 guides, and instructions on building from source.
 
 [![CI Status](https://github.com/openxla/iree/actions/workflows/ci.yml/badge.svg?query=branch%3Amain+event%3Apush)](https://github.com/openxla/iree/actions/workflows/ci.yml?query=branch%3Amain+event%3Apush)
-[![IREE Discord Status](https://discordapp.com/api/guilds/689900678990135345/widget.png?style=shield)]([https://discord.gg/26P4xW4](https://discord.gg/wEWh6Z9nMU))
+[![IREE Discord Status](https://discordapp.com/api/guilds/689900678990135345/widget.png?style=shield)]([https://discord.gg/wEWh6Z9nMU](https://discord.gg/wEWh6Z9nMU))
 
 #### Project Status