update badges (#132)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: 12rambau

README.rst

@@ -1,17 +1,23 @@
-.. image:: https://img.shields.io/pypi/v/doc8
-   :alt: PyPI
+.. image:: https://img.shields.io/pypi/v/doc8?logo=python&logoColor=white
    :target: https://pypi.org/project/doc8/
+   :alt: PyPI
 
-.. image:: https://github.com/PyCQA/doc8/workflows/tox/badge.svg
+.. image:: https://img.shields.io/github/actions/workflow/status/PyCQA/doc8/tox.yml?label=tox&logo=github&logoColor=white
    :target: https://github.com/PyCQA/doc8/actions
    :alt: CI
 
 .. image:: https://img.shields.io/pypi/l/doc8
+   :target: https://github.com/PyCQA/doc8/blob/main/LICENSE
    :alt: PyPI - License
 
 .. image:: https://img.shields.io/github/last-commit/pycqa/doc8
+   :target: https://github.com/PyCQA/doc8/commits/main
    :alt: GitHub last commit
 
+.. image:: https://img.shields.io/readthedocs/doc8/stable?logo=readthedocs&logoColor=white
+   :target: https://doc8.readthedocs.io/en/stable/index.html
+   :alt: Read the Docs (stable)
+
 ====
 doc8
 ====