Updated codecov version to 4.6.0 (#1378)

Author: asanzgom

.github/workflows/unit-tests.yaml

@@ -23,6 +23,6 @@ jobs:
         run: make unit-test
 
       - name: Upload results to Codecov
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v4.6.0
         with:
           token: ${{ secrets.CODECOV_TOKEN }}