Update dependency symfony/flex to v2.5.1

This MR contains the following updates:

Package	Type	Update	Change
symfony/flex	require	patch	2.5.0 -> 2.5.1

---

Release Notes

symfony/flex (symfony/flex)

v2.5.1

Compare Source

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻️ 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.