Fix coverage uploading per actions/upload-artifact#602 as GitHub broke it.

Author: domdfcoding

.github/workflows/python_ci_linux.yml

@@ -84,6 +84,7 @@ jobs:
         with:
           name: "coverage-${{ matrix.config.python-version }}"
           path: .coverage
+          include-hidden-files: true
 
 
   Coverage:
@@ -126,6 +127,7 @@ jobs:
         with:
           name: "combined-coverage"
           path: .coverage
+          include-hidden-files: true
 
       - name: "Upload Combined Coverage to Coveralls"
         if: ${{ steps.show.outcome != 'failure' }}