update actions status badge

Signed-off-by: Terence Parr <parrt@antlr.org>

README.md

@@ -8,13 +8,13 @@
 
 **Dev branch build status**
 
-* [![MacOSX](https://github.com/antlr/antlr4/actions/workflows/macosx.yml/badge.svg)](https://github.com/antlr/antlr4/actions/workflows/macosx.yml) (github actions)
+[![MacOSX, Windows, Linux](https://github.com/antlr/antlr4/actions/workflows/hosted.yml/badge.svg)](https://github.com/antlr/antlr4/actions/workflows/hosted.yml) (github actions)
 
+<!--
 * [![Windows](https://github.com/antlr/antlr4/actions/workflows/windows.yml/badge.svg?branch=dev)](https://github.com/antlr/antlr4/actions/workflows/windows.yml) (github actions)
 
 * [![Circle CI Build Status (Linux)](https://img.shields.io/circleci/build/gh/antlr/antlr4/master?label=Linux)](https://app.circleci.com/pipelines/github/antlr/antlr4) (CircleCI)
 
-<!--
 [![AppVeyor CI Build Status (Windows)](https://img.shields.io/appveyor/build/parrt/antlr4?label=Windows)](https://ci.appveyor.com/project/parrt/antlr4) 
 [![Travis-CI Build Status (Swift-Linux)](https://img.shields.io/travis/antlr/antlr4.svg?label=Linux-Swift&branch=master)](https://travis-ci.com/github/antlr/antlr4)
 -->