Update README.rst

Fies #139

Author: attwad

README.rst

@@ -4,8 +4,9 @@ python-osc
 
 Open Sound Control server and client implementations in **pure python** (3.5+).
 
-.. image:: https://travis-ci.org/attwad/python-osc.svg?branch=master
-    :target: https://travis-ci.org/attwad/python-osc
+.. image:: https://github.com/attwad/python-osc/actions/workflows/python-test.yml/badge.svg
+    :target: https://github.com/attwad/python-osc/actions/workflows/python-test.yml
+
 
 Current status
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