Bump codecov/codecov-action from 4 to 5

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] <[email protected]>

Author: dependabot[bot]

.github/workflows/testing.yaml

@@ -76,7 +76,7 @@ jobs:
             coverage.xml
       #       htmlcov
       # - name: codecov
-      #   uses: codecov/codecov-action@v4
+      #   uses: codecov/codecov-action@v5
       #   with:
       #     fail_ci_if_error: true  # optional (default = false)
       #     files: ./coverage.xml  # optional
@@ -135,7 +135,7 @@ jobs:
             htmlcov
             coverage.xml
       # - name: codecov
-      #   uses: codecov/codecov-action@v4
+      #   uses: codecov/codecov-action@v5
       #   with:
       #     fail_ci_if_error: true  # optional (default = false)
       #     files: ./coverage.xml  # optional
@@ -230,7 +230,7 @@ jobs:
             htmlcov
             coverage.xml
       # - name: codecov
-      #   uses: codecov/codecov-action@v4
+      #   uses: codecov/codecov-action@v5
       #   with:
       #     fail_ci_if_error: true  # optional (default = false)
       #     files: ./coverage.xml  # optional
@@ -285,7 +285,7 @@ jobs:
             htmlcov
             coverage.xml
       - name: codecov
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         with: