Bump gcloud from 0.8.11 to 0.8.12 in /app_dart (#3415)

Bumps [gcloud](https://github.com/dart-lang/gcloud) from 0.8.11 to 0.8.12.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/dart-lang/gcloud/releases">gcloud's releases</a>.</em></p>
<blockquote>
<h2>package:gcloud v0.8.12</h2>
<ul>
<li>Support the latest version 12.0.0 of the googleapis package.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/dart-lang/gcloud/blob/master/CHANGELOG.md">gcloud's changelog</a>.</em></p>
<blockquote>
<h2>0.8.12</h2>
<ul>
<li>Support the latest version 12.0.0 of the <code>googleapis</code> package.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/dart-lang/gcloud/commit/42f0d31559f1676132b35488b5a0cd4a3c070026"><code>42f0d31</code></a> Extend version constraint to allow googleapis 12.x (<a href="https://github.com/dart-lang/gcloud/issues/179">#179</a>)</li>
<li><a href="https://github.com/dart-lang/gcloud/commit/69bb2a99bcde12f85307fd8873f2e95e97076859"><code>69bb2a9</code></a> Bump dart-lang/setup-dart from 1.5.1 to 1.6.0 (<a href="https://github.com/dart-lang/gcloud/issues/176">#176</a>)</li>
<li><a href="https://github.com/dart-lang/gcloud/commit/6fd279b01a5ebb9c46fbf0398e51163bba31bfea"><code>6fd279b</code></a> Bump actions/checkout from 4.1.0 to 4.1.1 (<a href="https://github.com/dart-lang/gcloud/issues/175">#175</a>)</li>
<li><a href="https://github.com/dart-lang/gcloud/commit/da7ec400fc661cefbedf57d01ae544132ac79f3e"><code>da7ec40</code></a> Bump actions/checkout from 3.6.0 to 4.1.0 (<a href="https://github.com/dart-lang/gcloud/issues/172">#172</a>)</li>
<li><a href="https://github.com/dart-lang/gcloud/commit/6d3c3163e800f0d91d82d994a7091a7412fcabf9"><code>6d3c316</code></a> Bump dart-lang/setup-dart from 1.5.0 to 1.5.1 (<a href="https://github.com/dart-lang/gcloud/issues/173">#173</a>)</li>
<li><a href="https://github.com/dart-lang/gcloud/commit/7f87c786ac848b65c5c45e7c552cbf3c7400f8a6"><code>7f87c78</code></a> Bump actions/checkout from 3.5.3 to 3.6.0 (<a href="https://github.com/dart-lang/gcloud/issues/171">#171</a>)</li>
<li>See full diff in <a href="https://github.com/dart-lang/gcloud/compare/v0.8.11...v0.8.12">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=gcloud&package-manager=pub&previous-version=0.8.11&new-version=0.8.12)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

</details>

app_dart/pubspec.yaml

@@ -19,7 +19,7 @@ dependencies:
   dbcrypt: 2.0.0
   file: 7.0.0
   fixnum: 1.1.0
-  gcloud: 0.8.11
+  gcloud: 0.8.12
   github: 9.22.0
   googleapis: 11.4.0
   googleapis_auth: 1.4.1