Bump examples/codelabs from ec2353b to 8377b8f (flutter#10277)

Bumps [examples/codelabs](https://github.com/flutter/codelabs) from
`ec2353b` to `8377b8f`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/flutter/codelabs/commit/8377b8f2b7ef98a02a0d6dc23361666cb3ba6e5c"><code>8377b8f</code></a>
Bump actions/checkout from 4.1.1 to 4.1.2 (<a
href="https://redirect.github.com/flutter/codelabs/issues/2172">#2172</a>)</li>
<li>See full diff in <a
href="https://github.com/flutter/codelabs/compare/ec2353b7d1a0d1ef455902ec4253ef81aabe2d3f...8377b8f2b7ef98a02a0d6dc23361666cb3ba6e5c">compare
view</a></li>
</ul>
</details>
<br />


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`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<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>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>