Fix GitHub workflow badge (#1914)

See the linked GitHub issue from the previous version of the badge: badges/shields#8671

In summary, this badge was changed in a breaking fashion such that the badge was just linking to the github issue rather than showing the data. Updating the url resolves this.

I also updated the link for the badge, so it matches the behaviour of the badge more closely (matching on the workflow file, rather than the name).

README.rst

@@ -7,8 +7,8 @@ MoviePy
 .. image:: https://img.shields.io/gitter/room/movie-py/gitter?color=46BC99&logo=gitter
     :target: Gitter_
     :alt: Discuss MoviePy on Gitter
-.. image:: https://img.shields.io/github/workflow/status/Zulko/moviepy/Run%20Test%20Suite?logo=github
-    :target: https://github.com/Zulko/moviepy/actions?query=workflow%3A%22Run+Test+Suite%22
+.. image:: https://img.shields.io/github/actions/workflow/status/Zulko/moviepy/test_suite.yml?logo=github
+    :target: https://github.com/Zulko/moviepy/actions/workflows/test_suite.yml
     :alt: Build status on gh-actions
 .. image:: https://img.shields.io/coveralls/github/Zulko/moviepy/master?logo=coveralls
     :target: https://coveralls.io/github/Zulko/moviepy?branch=master