DOCS: Switch build badge from Azure Pipelines to GitHub Actions.

Author: baagaard-usgs

README.md

@@ -2,8 +2,7 @@
 
 [![DOI](https://www.zenodo.org/badge/DOI/10.5281/zenodo.14635926.svg)](https://doi.org/10.5281/zenodo.14635926)
 [![MIT License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/geodynamics/pylith/blob/main/LICENSE.md)
-[![Build Status](https://dev.azure.com/baagaard-usgs/pylith/_apis/build/status/geodynamics.pylith?branchName=main)](https://dev.azure.com/baagaard-usgs/pylith/_build/latest?definitionId=2&branchName=main)
-[![codecov](https://codecov.io/gh/geodynamics/pylith/branch/master/graph/badge.svg?token=JiwLVB64EF)](https://codecov.io/gh/geodynamics/pylith)
+[![Build Status](https://github.com/geodynamics/pylith/actions/workflows/ci-main.yml/badge.svg)](https://github.com/geodynamics/pylith/actions/workflows/ci-main.yml)
 
 ## Description