chore(deps): update line-openapi digest to 69a12e8 (#811)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| line-openapi | digest | `3e09054` -> `69a12e8` |

---

### Configuration

📅 **Schedule**: Branch creation - "after 11pm,before 4am" in timezone
Asia/Tokyo, 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/line/line-bot-sdk-python).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MC4xNi4wIiwidXBkYXRlZEluVmVyIjoiNDAuMTYuMCIsInRhcmdldEJyYW5jaCI6Im1hc3RlciIsImxhYmVscyI6WyJkZXBlbmRlbmN5IHVwZ3JhZGUiLCJsaW5lLW9wZW5hcGktdXBkYXRlIl19-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]