chore: remove discord link (#109)

README.md

@@ -4,7 +4,7 @@ Helm charts maintained by the OpenFGA team!
 
 [![Artifact HUB](https://img.shields.io/endpoint?url=https://artifacthub.io/badge/repository/openfga)](https://artifacthub.io/packages/helm/openfga/openfga)
 [![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](./LICENSE)
-[![Discord Server](https://img.shields.io/discord/759188666072825867?color=7289da&logo=discord "Discord Server")](https://discord.gg/8naAwJfWN6)
+[![Join our community](https://img.shields.io/badge/slack-cncf_%23openfga-40abb8.svg?logo=slack)](https://openfga.dev/community)
 [![Twitter](https://img.shields.io/twitter/follow/openfga?color=%23179CF0&logo=twitter&style=flat-square "@openfga on Twitter")](https://twitter.com/openfga)
 
 [OpenFGA](https://github.com/openfga/openfga) is a high-performance and flexible authorization/permission engine built for developers and inspired by [Google Zanzibar](https://research.google/pubs/pub48190/).
@@ -25,4 +25,4 @@ See [CONTRIBUTING](https://github.com/openfga/.github/blob/main/CONTRIBUTING.md)
 
 ## License
 
-This project is licensed under the Apache-2.0 license. See the [LICENSE](https://github.com/openfga/helm-charts/blob/main/LICENSE) file for more info.
+This project is licensed under the Apache-2.0 license. See the [LICENSE](https://github.com/openfga/helm-charts/blob/main/LICENSE) file for more info.