chore(deps): update mxschmitt/action-tmate digest to c6f0481 in .github/workflows/credentials.yml#469

This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [mxschmitt/action-tmate](https://redirect.github.com/mxschmitt/action-tmate) | action | digest | `e5c7151` -> `c6f0481` | --- ### Configuration 📅 **Schedule**: Branch creation - Between 12:00 AM and 03:59 AM ( * 0-3 * * * ) (UTC), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR was generated by [Mend Renovate](https://mend.io/renovate/). View the [repository job log](https://developer.mend.io/github/chenrui333/github-action-test). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yNDguNCIsInVwZGF0ZWRJblZlciI6IjM5LjI0OC40IiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJkZXBlbmRlbmNpZXMiXX0=-->