Update dependency sass to v1.56.1 (#992)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [sass](https://togithub.com/sass/dart-sass) | [`1.56.0` ->
`1.56.1`](https://renovatebot.com/diffs/npm/sass/1.56.0/1.56.1) |
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|
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|
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|
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### Release Notes

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

###
[`v1.56.1`](https://togithub.com/sass/dart-sass/blob/HEAD/CHANGELOG.md#&#8203;1561)

[Compare
Source](https://togithub.com/sass/dart-sass/compare/1.56.0...1.56.1)

##### Embedded Sass

- Importer results now validate that `contents` is actually a string and
whether
    `sourceMapUrl` is an absolute URL.

</details>

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package.json

@@ -47,7 +47,7 @@
 		"prettier-plugin-svelte": "2.8.0",
 		"prismjs": "1.29.0",
 		"sanitize.css": "13.0.0",
-		"sass": "1.56.0",
+		"sass": "1.56.1",
 		"svelte": "3.52.0",
 		"svelte-check": "2.9.2",
 		"svelte-preprocess": "4.10.7",