Update README.md (#16353)

- update badge for build status
- update badge for built-in extension publishing
- update X link

Author: ndoschek

README.md

@@ -8,8 +8,8 @@
 <div id="badges" align="center">
 
   [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-curved)](https://github.com/eclipse-theia/theia/labels/help%20wanted)
-  [![Build Status](https://github.com/eclipse-theia/theia/workflows/Build/badge.svg?branch=master)](https://github.com/eclipse-theia/theia/actions?query=branch%3Amaster+event%3Apush+event%3Aschedule)
-  [![Publish VS Code Built-in Extensions](https://github.com/eclipse-theia/vscode-builtin-extensions/actions/workflows/publish-vsx-latest.yml/badge.svg?branch=master)](https://github.com/eclipse-theia/vscode-builtin-extensions/actions/workflows/publish-vsx-latest.yml)
+  [![Build Status](https://github.com/eclipse-theia/theia/actions/workflows/ci-cd.yml/badge.svg?branch=master)](https://github.com/eclipse-theia/theia/actions/workflows/ci-cd.yml?query=branch%3Amaster)
+  [![Publish VS Code Built-in Extensions](https://github.com/eclipse-theia/vscode-builtin-extensions/actions/workflows/build.yml/badge.svg?branch=master)](https://github.com/eclipse-theia/vscode-builtin-extensions/actions/workflows/build.yml?query=branch%3Amaster)
   [![Open questions](https://img.shields.io/badge/Open-questions-blue.svg?style=flat-curved)](https://github.com/eclipse-theia/theia/discussions/categories/q-a)
   [![Open bugs](https://img.shields.io/badge/Open-bugs-red.svg?style=flat-curved)](https://github.com/eclipse-theia/theia/labels/bug)
   [![Gitpod Ready-to-Code](https://img.shields.io/badge/Gitpod-Ready--to--Code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/eclipse-theia/theia)
@@ -96,7 +96,7 @@ Read below how to engage with Theia community:
 - Ask a question, request a new feature and file a bug with [GitHub issues](https://github.com/eclipse-theia/theia/issues/new/choose).
 - Vote on existing GitHub issues by reacting with a 👍. We regularly check issues with votes!
 - Star the repository to show your support.
-- Follow Theia on [Twitter](https://twitter.com/theia_ide).
+- Follow Theia on [X](https://x.com/theia_ide).
 - Join the [weekly developer call](https://github.com/eclipse-theia/theia/wiki/Dev-Meetings)
 
 ## Documentation