Consolidate workflow

Author: jfarcand

.github/workflows/maven.yml

@@ -1,4 +1,4 @@
-name: Atmopshere Build
+name: Atmosphere
 
 on:
   push:

README.md

@@ -8,8 +8,9 @@ Atmosphere's Java/Scala/Android Client is called [wAsync](https://github.com/Atm
 
 Main development branch is [atmosphere-2.7.x](https://github.com/Atmosphere/atmosphere/tree/atmosphere-2.7.x). Jakarta support is supported on branch `main`
 
-![JDK8](https://github.com/Atmosphere/atmosphere/workflows/JDK8/badge.svg) ![JDK11](https://github.com/Atmosphere/atmosphere/workflows/JDK11/badge.svg) ![JDK13](https://github.com/Atmosphere/atmosphere/workflows/JDK13/badge.svg) ![JDK15](https://github.com/Atmosphere/atmosphere/workflows/JDK15/badge.svg) ![JDK17](https://github.com/Atmosphere/atmosphere/workflows/JDK17/badge.svg) ![JDK18](https://github.com/Atmosphere/atmosphere/workflows/JDK18/badge.svg)
+2.7.x: [![Atmopshere 2.7.x](https://github.com/Atmosphere/atmosphere/actions/workflows/maven.yml/badge.svg?branch=atmosphere-2.7.x)](https://github.com/Atmosphere/atmosphere/actions/workflows/maven.yml)
 
+3.0.x: [![Atmopshere 3.0.x](https://github.com/Atmosphere/atmosphere/actions/workflows/maven.yml/badge.svg?branch=main)](https://github.com/Atmosphere/atmosphere/actions/workflows/maven.yml)
 
 ### Commercial support
 Commercial Support is available via [Async-IO.org](http://async-io.org)