docs: update badge link (#1892)

I realized that the name of the script have been updated so I updated
the one use in the badge.

README.md

@@ -3,7 +3,7 @@
 [![License badge](https://img.shields.io/badge/License-BSD_3--Clause-yellow?logo=opensourceinitiative&logoColor=white)](https://github.com/pydata/pydata-sphinx-theme/blob/main/LICENSE)
 [![PyPI version badge](https://img.shields.io/pypi/v/pydata-sphinx-theme?logo=python&logoColor=white&color=orange)](https://pypi.org/project/pydata-sphinx-theme/)
 [![conda-forge version badge](https://img.shields.io/conda/vn/conda-forge/pydata-sphinx-theme.svg?logo=anaconda&logoColor=white&color=orange)](https://anaconda.org/conda-forge/pydata-sphinx-theme)
-[![GitHub Workflow test status badge](https://img.shields.io/github/actions/workflow/status/pydata/pydata-sphinx-theme/tests.yml?logo=github&logoColor=white)](https://github.com/pydata/pydata-sphinx-theme/actions/workflows/tests.yml)
+[![GitHub Workflow test status badge](https://img.shields.io/github/actions/workflow/status/pydata/pydata-sphinx-theme/CI.yml?logo=github&logoColor=white)](https://github.com/pydata/pydata-sphinx-theme/actions/workflows/CI.yml)
 [![Read the Docs build status badge](https://img.shields.io/readthedocs/pydata-sphinx-theme/latest?logo=readthedocs&logoColor=white)](https://readthedocs.org/projects/pydata-sphinx-theme/builds/)
 
 A clean, three-column, Bootstrap-based Sphinx theme by and for the [PyData community](https://pydata.org).