fix(deps): update dependency symfony/flex to v1.19.3

This MR contains the following updates:

Package	Type	Update	Change
symfony/flex	require	patch	1.19.2 -> 1.19.3

---

Release Notes

symfony/flex

v1.19.3

Compare Source

---

Configuration

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

🚦 Automerge: Enabled.

♻ 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, click this checkbox.

---

This MR has been generated by Renovate Bot.