Bump codecov/codecov-action from 4 to 5 (#525)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 4 to 5.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v4...v5)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/test_GNNGraphs.yml

@@ -43,6 +43,6 @@ jobs:
         with:
           # directories: ./GNNGraphs/src, ./GNNGraphs/ext
           directories: ./GNNGraphs/src
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
         with:
           files: lcov.info

.github/workflows/test_GNNLux.yml

@@ -43,6 +43,6 @@ jobs:
         with:
           # directories: ./GNNLux/src, ./GNNLux/ext
           directories: ./GNNLux/src
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
         with:
           files: lcov.info

.github/workflows/test_GNNlib.yml

@@ -43,6 +43,6 @@ jobs:
         with:
           # directories: ./GNNlib/src, ./GNNlib/ext
           directories: ./GNNlib/src
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
         with:
           files: lcov.info

.github/workflows/test_GraphNeuralNetworks.yml

@@ -43,6 +43,6 @@ jobs:
         with:
           # directories: ./GraphNeuralNetworks/src, ./GraphNeuralNetworks/ext
           directories: ./GraphNeuralNetworks/src
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
         with:
           files: lcov.info