Rename github action workflow

.github/workflows/tests.yml

@@ -1,7 +1,7 @@
 # This workflow will install Python dependencies, run tests and lint with a variety of Python versions
 # For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
 
-name: Python package
+name: tests
 
 on:
   push:

README.rst

@@ -2,8 +2,9 @@
  JayDeBeApi - bridge from JDBC database drivers to Python DB-API
 =================================================================
 
-.. image:: https://github.com/baztian/jaydebeapi/workflows/CI/badge.svg
-   :target: https://github.com/baztian/jaydebeapi/actions
+.. image:: https://github.com/baztian/jaydebeapi/workflows/tests/badge.svg
+   :target: https://github.com/baztian/jaydebeapi/actions?query=workflow%3Atests
+   :alt: test status
 
 .. image:: https://img.shields.io/coveralls/baztian/jaydebeapi/master.svg
     :target: https://coveralls.io/r/baztian/jaydebeapi