chore(deps): update codecov/codecov-action action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -193,7 +193,7 @@ jobs:
         run: make -j2 test
 
       - name: Publish Unit Test Coverage
-        uses: codecov/codecov-action@1af58845a975a7985b0beb0cbe6fbbb71a41dbad # v5
+        uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2 # v6
         with:
           flags: unittests
           file: _output/tests/linux_amd64/coverage.txt