docs: replace old travis CI badge with one for GH worfklow

Signed-off-by: Christopher Arndt <[email protected]>

Author: SpotlightKid

.github/workflows/development.yml

@@ -1,4 +1,4 @@
-name: Build sdist and wheel and publish to TestPyPI
+name: Build sdist and wheels and publish to TestPyPI
 
 on:
   push:

.github/workflows/production.yml

@@ -1,4 +1,4 @@
-name: Build sdist and wheel and publish to PyPI
+name: Build sdist and wheels and publish to PyPI
 
 on:
   release:

.github/workflows/tests.yml

@@ -1,4 +1,4 @@
-name: Build sdist and wheel for testing purposes
+name: Build sdist and wheels for testing purposes
 
 on:
   push:

README.md

@@ -7,7 +7,7 @@ A Python binding for the RtMidi C++ library implemented using Cython.
 [![MIT License](https://shields.io/pypi/l/python-rtmidi)](LICENSE.md)
 ![Python versions](https://shields.io/pypi/pyversions/python-rtmidi)
 [![Distribution format](https://shields.io/pypi/format/python-rtmidi)](https://pypi.org/project/python-rtmidi/#files)
-[![Travis CI status](https://travis-ci.org/SpotlightKid/python-rtmidi.svg?branch=master)](https://travis-ci.org/SpotlightKid/python-rtmidi)
+[![CI status](https://github.com/SpotlightKid/python-rtmidi/actions/workflows/production.yml/badge.svg)](https://github.com/SpotlightKid/python-rtmidi/actions)
 
 # Overview