Update dependency acorn to v8.12.0 (#2101)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [acorn](https://togithub.com/acornjs/acorn) | [`8.11.3` -> `8.12.0`](https://renovatebot.com/diffs/npm/acorn/8.11.3/8.12.0) | [![age](https://developer.mend.io/api/mc/badges/age/npm/acorn/8.12.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/acorn/8.12.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/acorn/8.11.3/8.12.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/acorn/8.11.3/8.12.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>acornjs/acorn (acorn)</summary>

### [`v8.12.0`](https://togithub.com/acornjs/acorn/compare/8.11.3...8.12.0)

[Compare Source](https://togithub.com/acornjs/acorn/compare/8.11.3...8.12.0)

</details>

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Author: renovate[bot]

packages/next/package.json

@@ -192,7 +192,7 @@
     "@types/ws": "8.5.10",
     "@vercel/ncc": "0.38.1",
     "@vercel/nft": "0.27.2",
-    "acorn": "8.11.3",
+    "acorn": "8.12.0",
     "ajv": "8.16.0",
     "amphtml-validator": "1.0.38",
     "anser": "2.1.1",