chore(deps): update nextjs monorepo to v15.3.1 (#354)

This PR contains the following updates:

| Package | Type | Update | Change | OpenSSF |
|---|---|---|---|---|
| [@next/third-parties](https://redirect.github.com/vercel/next.js)
([source](https://redirect.github.com/vercel/next.js/tree/HEAD/packages/third-parties))
| dependencies | patch | [`15.3.0` ->
`15.3.1`](https://renovatebot.com/diffs/npm/@next%2fthird-parties/15.3.0/15.3.1)
| [![OpenSSF
Scorecard](https://api.securityscorecards.dev/projects/github.com/vercel/next.js/badge)](https://securityscorecards.dev/viewer/?uri=github.com/vercel/next.js)
|
|
[eslint-config-next](https://nextjs.org/docs/app/api-reference/config/eslint)
([source](https://redirect.github.com/vercel/next.js/tree/HEAD/packages/eslint-config-next))
| devDependencies | patch | [`15.3.0` ->
`15.3.1`](https://renovatebot.com/diffs/npm/eslint-config-next/15.3.0/15.3.1)
| [![OpenSSF
Scorecard](https://api.securityscorecards.dev/projects/github.com/vercel/next.js/badge)](https://securityscorecards.dev/viewer/?uri=github.com/vercel/next.js)
|
| [next](https://nextjs.org)
([source](https://redirect.github.com/vercel/next.js)) | dependencies |
patch | [`15.3.0` ->
`15.3.1`](https://renovatebot.com/diffs/npm/next/15.3.0/15.3.1) |
[![OpenSSF
Scorecard](https://api.securityscorecards.dev/projects/github.com/vercel/next.js/badge)](https://securityscorecards.dev/viewer/?uri=github.com/vercel/next.js)
|

---

### Release Notes

<details>
<summary>vercel/next.js (@&#8203;next/third-parties)</summary>

###
[`v15.3.1`](https://redirect.github.com/vercel/next.js/compare/v15.3.0...v15.3.1)

[Compare
Source](https://redirect.github.com/vercel/next.js/compare/v15.3.0...v15.3.1)

</details>

<details>
<summary>vercel/next.js (eslint-config-next)</summary>

###
[`v15.3.1`](https://redirect.github.com/vercel/next.js/compare/v15.3.0...v15.3.1)

[Compare
Source](https://redirect.github.com/vercel/next.js/compare/v15.3.0...v15.3.1)

</details>

<details>
<summary>vercel/next.js (next)</summary>

###
[`v15.3.1`](https://redirect.github.com/vercel/next.js/compare/v15.3.0...v15.3.1)

[Compare
Source](https://redirect.github.com/vercel/next.js/compare/v15.3.0...v15.3.1)

</details>

---

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bun.lock

@@ -14,7 +14,7 @@
     "generate-sitemap": "bun scripts/generate-sitemap.ts"
   },
   "dependencies": {
-    "@next/third-parties": "15.3.0",
+    "@next/third-parties": "15.3.1",
     "@theguild/remark-mermaid": "0.3.0",
     "class-variance-authority": "0.7.1",
     "clsx": "2.1.1",
@@ -24,7 +24,7 @@
     "fumadocs-twoslash": "3.1.1",
     "fumadocs-ui": "15.2.8",
     "lucide-react": "0.488.0",
-    "next": "15.3.0",
+    "next": "15.3.1",
     "posthog-js": "1.236.2",
     "posthog-node": "4.12.0",
     "prettier": "3.5.3",
@@ -46,7 +46,7 @@
     "tailwindcss": "4.1.4",
     "typescript": "5.8.3",
     "eslint": "9.24.0",
-    "eslint-config-next": "15.3.0",
+    "eslint-config-next": "15.3.1",
     "@eslint/eslintrc": "3.3.1",
     "@eslint/js": "9.24.0"
   }