Adjust links in README

Author: jreznot

README.md

@@ -1,9 +1,8 @@
 # IntelliJ Platform Plugin Template
 
 [![official JetBrains project](https://jb.gg/badges/official.svg)][jb:github]
-[![Twitter Follow](https://img.shields.io/badge/follow-%40JBPlatform-1DA1F2?logo=twitter)](https://twitter.com/JBPlatform)
+[![Twitter Follow](https://img.shields.io/badge/follow-%40JBPlatform-1DA1F2?logo=twitter)](https://x.com/JBPlatform)
 [![Build](https://github.com/JetBrains/intellij-platform-plugin-template/workflows/Build/badge.svg)][gh:build]
-[![Slack](https://img.shields.io/badge/Slack-%23intellij--platform-blue?style=flat-square&logo=Slack)](https://plugins.jetbrains.com/slack)
 
 ![IntelliJ Platform Plugin Template][file:intellij-platform-plugin-template-dark]
 ![IntelliJ Platform Plugin Template][file:intellij-platform-plugin-template-light]