Enable coverage tracking in CI

Author: cottsay

.github/workflows/ci.yaml

@@ -1,3 +1,4 @@
+---
 name: Run tests
 
 on:
@@ -8,3 +9,5 @@ on:
 jobs:
   pytest:
     uses: colcon/ci/.github/workflows/pytest.yaml@main
+    secrets:
+      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}