Fix badges.

README.rst

@@ -3,15 +3,15 @@
 ==============
 
 .. image:: https://img.shields.io/pypi/v/zope.viewlet.svg
-        :target: https://pypi.python.org/pypi/zope.viewlet/
+        :target: https://pypi.org/project/zope.viewlet/
         :alt: Latest release
 
 .. image:: https://img.shields.io/pypi/pyversions/zope.viewlet.svg
         :target: https://pypi.org/project/zope.viewlet/
         :alt: Supported Python versions
 
-.. image:: https://travis-ci.com/zopefoundation/zope.viewlet.svg?branch=master
-        :target: https://travis-ci.com/zopefoundation/zope.viewlet
+.. image:: https://github.com/zopefoundation/zope.viewlet/actions/workflows/tests.yml/badge.svg
+        :target: https://github.com/zopefoundation/zope.viewlet/actions/workflows/tests.yml
 
 .. image:: https://coveralls.io/repos/github/zopefoundation/zope.viewlet/badge.svg?branch=master
         :target: https://coveralls.io/github/zopefoundation/zope.viewlet?branch=master
@@ -23,7 +23,7 @@
 
 Viewlets provide a generic framework for building pluggable user
 interfaces. Viewlets are a special type of `content provider
-<https://pypi.python.org/pypi/zope.contentprovider>`_ that allows a
+<https://pypi.org/project/zope.contentprovider/>`_ that allows a
 template to define a region (a "viewlet manager") into which content
 ("viewlets") can be plugged.