Update gz-plugin3 badge URLs (#148)

* Update gz-plugin3 badge URLs

Signed-off-by: Carlos Agüero <caguero@openrobotics.org>

Author: caguero

README.md

@@ -9,10 +9,10 @@
 
 Build | Status
 -- | --
-Test coverage | [![codecov](https://codecov.io/gh/gazebosim/gz-plugin/tree/main/graph/badge.svg)](https://codecov.io/gh/gazebosim/gz-plugin/tree/main)
-Ubuntu Jammy  | [![Build Status](https://build.osrfoundation.org/job/gz_plugin-ci-main-jammy-amd64/badge/icon)](https://build.osrfoundation.org/job/gz_plugin-ci-main-jammy-amd64/)
-Homebrew      | [![Build Status](https://build.osrfoundation.org/buildStatus/icon?job=gz_plugin-ci-main-homebrew-amd64)](https://build.osrfoundation.org/job/gz_plugin-ci-main-homebrew-amd64)
-Windows       | [![Build Status](https://build.osrfoundation.org/buildStatus/icon?job=gz_plugin-main-win)](https://build.osrfoundation.org/job/gz_plugin-main-win)
+Test coverage | [![codecov](https://codecov.io/gh/gazebosim/gz-plugin/tree/gz-plugin3/graph/badge.svg)](https://codecov.io/gh/gazebosim/gz-plugin/tree/gz-plugin3)
+Ubuntu Noble  | [![Build Status](https://build.osrfoundation.org/job/gz_plugin-ci-gz-plugin3-noble-amd64/badge/icon)](https://build.osrfoundation.org/job/gz_plugin-ci-gz-plugin3-noble-amd64/)
+Homebrew      | [![Build Status](https://build.osrfoundation.org/buildStatus/icon?job=gz_plugin-ci-gz-plugin3-homebrew-amd64)](https://build.osrfoundation.org/job/gz_plugin-ci-gz-plugin3-homebrew-amd64)
+Windows       | [![Build Status](https://build.osrfoundation.org/buildStatus/icon?job=gz_plugin-3-win)](https://build.osrfoundation.org/job/gz_plugin-3-win)
 
 
 Gazebo Plugin is a component in the [Gazebo](http://gazebosim.org) framework, a set