Adds include-hidden-files: true to tests.yml so that coverage actually uploads.

Author: 56kyle

{{cookiecutter.project_name}}/.github/workflows/tests.yml

@@ -101,6 +101,7 @@ jobs:
         with:
           name: coverage-data
           path: ".coverage.*"
+          include-hidden-files: true
 
       - name: Upload documentation
         if: matrix.session == 'docs-build'