chore(deps): lock file maintenance appengine-frontend (#2555)

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 | [`1.77.8` ->
`1.78.0`](https://renovatebot.com/diffs/npm/sass/1.77.8/1.78.0) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/sass/1.78.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/sass/1.78.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/sass/1.77.8/1.78.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/sass/1.77.8/1.78.0?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>

###
[`v1.78.0`](https://redirect.github.com/sass/dart-sass/blob/HEAD/CHANGELOG.md#1780)

[Compare
Source](https://redirect.github.com/sass/dart-sass/compare/1.77.8...1.78.0)

- The `meta.feature-exists` function is now deprecated. This deprecation
is
    named `feature-exists`.

- Fix a crash when using `@at-root` without any queries or children in
the
    indented syntax.

##### JS API

- Backport the deprecation options (`fatalDeprecations`,
`futureDeprecations`,
and `silenceDeprecations`) to the legacy JS API. The legacy JS API is
itself
deprecated, and you should move off of it if possible, but this will
allow
users of bundlers and other tools that are still using the legacy API to
    still control deprecation warnings.

- Fix a bug where accessing `SourceSpan.url` would crash when a relative
URL was
    passed to the Sass API.

##### Embedded Sass

- Explicitly expose a `sass` executable from the `sass-embedded` npm
package.
    This was intended to be included in 1.63.0, but due to the way
platform-specific dependency executables are installed it did not work
as
intended. Now users can run `npx sass` for local installs or just `sass`
when
    `sass-embedded` is installed globally.

- Add linux-riscv64, linux-musl-riscv64, and android-riscv64 support for
the
    `sass-embedded` npm package.

- Fix an edge case where the Dart VM could hang when shutting down when
requests
    were in flight.

- Fix a race condition where the embedded host could fail to shut down
if it was
    closed around the same time a new compilation was started.

- Fix a bug where parse-time deprecation warnings could not be
controlled by
    the deprecation options in some circumstances.

</details>

---

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are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

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---

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---

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gcp/appengine/frontend3/package.json

@@ -24,7 +24,7 @@
     "html-webpack-plugin": "5.6.0",
     "mini-css-extract-plugin": "2.9.1",
     "raw-loader": "4.0.2",
-    "sass": "1.77.8",
+    "sass": "1.78.0",
     "sass-loader": "12.6.0",
     "style-loader": "3.3.4",
     "webpack": "5.94.0",