Use Codecov action instead of deprecated bash uploader

Author: tobiasraabe

.github/workflows/main.yml

@@ -58,5 +58,6 @@ jobs:
 
       - name: Upload coverage report
         if: runner.os == 'Linux' && matrix.python-version == '3.10'
-        shell: bash -l {0}
-        run: bash <(curl -s https://codecov.io/bash) -c
+        uses: codecov/codecov-action@v5
+        with:
+          files: ./coverage.xml