upgrade: update dependency flutter to v3.24.0 (#551)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [flutter](https://flutter.dev)
([source](https://togithub.com/flutter/flutter)) | minor | `3.22.3` ->
`3.24.0` |

---

### Release Notes

<details>
<summary>flutter/flutter (flutter)</summary>

###
[`v3.24.0`](https://togithub.com/flutter/flutter/compare/3.22.3...3.24.0)

[Compare
Source](https://togithub.com/flutter/flutter/compare/3.22.3...3.24.0)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "every weekend" in timezone
Asia/Tokyo, Automerge - At any time (no schedule defined).

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

♻ **Rebasing**: Whenever PR becomes conflicted, 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://www.mend.io/free-developer-tools/renovate/). View the
[repository job
log](https://developer.mend.io/github/FlutterGen/flutter_gen).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC4yMC4xIiwidXBkYXRlZEluVmVyIjoiMzguMjAuMSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

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

Author: renovate[bot]

.tool-versions

@@ -1,2 +1,2 @@
 dart 3.5.0
-flutter 3.22.3-stable
+flutter 3.24.0-stable