Merge pull request #36 from alan-turing-institute/dependabot/github_actions/codecov/codecov-action-5.5.1

Bump codecov/codecov-action from 4.3.0 to 5.5.1

Author: rwood-97

.github/workflows/ci.yml

@@ -52,4 +52,4 @@ jobs:
           --durations=20
 
       - name: Upload coverage report
-        uses: codecov/codecov-action@v4.3.0
+        uses: codecov/codecov-action@v5.5.2