Update fluent/fluent-bit:1.8.6 Docker digest to ca7751c

This MR contains the following updates:

Package	Type	Update	Change
fluent/fluent-bit	ironbank-docker	digest	22a22ae -> ca7751c

---

Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled due to failing status checks.

♻ Rebasing: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this MR and you won't be reminded about this update again.

---

• If you want to rebase/retry this MR, check this box.

---

This MR has been generated by Renovate Bot.