Update badges

Author: ndevenish

README.rst

@@ -22,18 +22,10 @@ Workflows
         :target: https://pypi.org/project/workflows/
         :alt: Supported Python versions
 
-.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
-        :target: https://github.com/psf/black
+.. image:: https://img.shields.io/badge/code%20style-ruff-000000.svg
+        :target: https://github.com/astral-sh/ruff
         :alt: Code style: black
 
-.. image:: https://img.shields.io/lgtm/grade/python/g/DiamondLightSource/python-workflows.svg?logo=lgtm&logoWidth=18
-        :target: https://lgtm.com/projects/g/DiamondLightSource/python-workflows/context:python
-        :alt: Language grade: Python
-
-.. image:: https://img.shields.io/lgtm/alerts/g/DiamondLightSource/python-workflows.svg?logo=lgtm&logoWidth=18
-        :target: https://lgtm.com/projects/g/DiamondLightSource/python-workflows/alerts/
-        :alt: Total alerts
-
 Workflows enables light-weight services to process tasks in a message-oriented
 environment.