chore(deps): lock file maintenance appengine-frontend (#2877)

This PR contains the following updates:

| Package | Type | Update | Change | Age | Adoption | Passing |
Confidence |
|---|---|---|---|---|---|---|---|
|  |  | lockFileMaintenance | All locks refreshed |  |  |  |  |
| [sass](https://redirect.github.com/sass/dart-sass) | devDependencies |
minor | [`1.80.7` ->
`1.81.0`](https://renovatebot.com/diffs/npm/sass/1.80.7/1.81.0) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/sass/1.81.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/sass/1.81.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/sass/1.80.7/1.81.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/sass/1.80.7/1.81.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

🔧 This Pull Request updates lock files to use the latest dependency
versions.

---

### Release Notes

<details>
<summary>sass/dart-sass (sass)</summary>

###
[`v1.81.0`](https://redirect.github.com/sass/dart-sass/blob/HEAD/CHANGELOG.md#1810)

[Compare
Source](https://redirect.github.com/sass/dart-sass/compare/1.80.7...1.81.0)

- Fix a few cases where deprecation warnings weren't being emitted for
global
    built-in functions whose names overlap with CSS calculations.

- Add support for the CSS `round()` calculation with a single argument,
as long
    as that argument might be a unitless number.

</details>

---

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---

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---

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gcp/appengine/frontend3/package.json

@@ -24,7 +24,7 @@
     "html-webpack-plugin": "5.6.3",
     "mini-css-extract-plugin": "2.9.2",
     "raw-loader": "4.0.2",
-    "sass": "1.80.7",
+    "sass": "1.81.0",
     "sass-loader": "12.6.0",
     "style-loader": "3.3.4",
     "webpack": "5.96.1",