chore(deps): update codecov/codecov-action action to v4.6.0

Author: renovate[bot]

.github/workflows/reusable-tox.yml

@@ -367,7 +367,7 @@ jobs:
       if: >-
         !cancelled()
         && steps.tox-run.outputs.cov-report-files != ''
-      uses: codecov/codecov-action@v4
+      uses: codecov/codecov-action@b9fd7d16f6d7d1b5d2bec1a2887e65ceed900238 # v4.6.0
       with:
         disable_search: true
         fail_ci_if_error: >-