Update dependency sass to ^1.77.1 (#6435)

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

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [sass](https://togithub.com/sass/dart-sass) | [`^1.75.0` ->
`^1.77.1`](https://renovatebot.com/diffs/npm/sass/1.75.0/1.77.1) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/sass/1.77.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/sass/1.77.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/sass/1.75.0/1.77.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/sass/1.75.0/1.77.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

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

###
[`v1.77.1`](https://togithub.com/sass/dart-sass/blob/HEAD/CHANGELOG.md#1771)

[Compare
Source](https://togithub.com/sass/dart-sass/compare/1.77.0...1.77.1)

-   Fix a crash that could come up with importers in certain contexts.

###
[`v1.77.0`](https://togithub.com/sass/dart-sass/blob/HEAD/CHANGELOG.md#1770)

[Compare
Source](https://togithub.com/sass/dart-sass/compare/1.76.0...1.77.0)

-   *Don't* throw errors for at-rules in keyframe blocks.

###
[`v1.76.0`](https://togithub.com/sass/dart-sass/blob/HEAD/CHANGELOG.md#1760)

[Compare
Source](https://togithub.com/sass/dart-sass/compare/1.75.0...1.76.0)

-   Throw errors for misplaced statements in keyframe blocks.

- Mixins and functions whose names begin with `--` are now deprecated
for
forwards-compatibility with the in-progress CSS functions and mixins
spec.
    This deprecation is named `css-function-mixin`.

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "before 8pm on monday" in timezone
America/Chicago, 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 has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://developer.mend.io/github/compiler-explorer/compiler-explorer).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4zNDAuMTAiLCJ1cGRhdGVkSW5WZXIiOiIzNy4zNTEuMiIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

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

package.json

@@ -135,7 +135,7 @@
     "monaco-editor-webpack-plugin": "^7.1.0",
     "nock": "^13.5.4",
     "prettier": "^3.2.5",
-    "sass": "^1.75.0",
+    "sass": "^1.77.1",
     "sass-loader": "^14.2.1",
     "sinon": "^17.0.1",
     "source-map-loader": "^5.0.0",