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

Author: renovate[bot]

.github/workflows/test.yaml

@@ -51,7 +51,7 @@ jobs:
       - name: Run coverage (IO tests and Spec tests against latest supported PostgreSQL)
         run: postgrest-coverage
       - name: Upload coverage to codecov
-        uses: codecov/codecov-action@1af58845a975a7985b0beb0cbe6fbbb71a41dbad # v5.5.3
+        uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2 # v6.0.0
         with:
           files: ./coverage/codecov.json
           token: ${{ secrets.CODECOV_TOKEN }}