Switch PyPI action param case to kebab

Fixes deprecation warning about repository_url.

Author: bennettgoble

.github/workflows/ci.yaml

@@ -72,7 +72,7 @@ jobs:
       - name: Test Publish package
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
-          repository_url: https://test.pypi.org/legacy/
+          repository-url: https://test.pypi.org/legacy/
 
       - name: Publish package
         uses: pypa/gh-action-pypi-publish@release/v1