chore(deps): bump the patch-updates group across 1 directory with 4 updates

Bumps the patch-updates group with 4 updates in the / directory: [better-auth](https://github.com/better-auth/better-auth/tree/HEAD/packages/better-auth), [source-map-support](https://github.com/evanw/node-source-map-support), [fumadocs-core](https://github.com/fuma-nama/fumadocs) and [fumadocs-ui](https://github.com/fuma-nama/fumadocs).


Updates `better-auth` from 1.4.17 to 1.4.18
- [Release notes](https://github.com/better-auth/better-auth/releases)
- [Commits](https://github.com/better-auth/better-auth/commits/v1.4.18/packages/better-auth)

Updates `source-map-support` from 0.5.13 to 0.5.21
- [Release notes](https://github.com/evanw/node-source-map-support/releases)
- [Commits](evanw/node-source-map-support@v0.5.13...v0.5.21)

Updates `fumadocs-core` from 16.4.9 to 16.4.10
- [Release notes](https://github.com/fuma-nama/fumadocs/releases)
- [Commits](https://github.com/fuma-nama/fumadocs/compare/fumadocs-core@16.4.9...fumadocs-core@16.4.10)

Updates `fumadocs-ui` from 16.4.9 to 16.4.10
- [Release notes](https://github.com/fuma-nama/fumadocs/releases)
- [Commits](https://github.com/fuma-nama/fumadocs/compare/fumadocs-ui@16.4.9...fumadocs-ui@16.4.10)

---
updated-dependencies:
- dependency-name: better-auth
  dependency-version: 1.4.18
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: patch-updates
- dependency-name: source-map-support
  dependency-version: 0.5.21
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: patch-updates
- dependency-name: fumadocs-core
  dependency-version: 16.4.10
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: patch-updates
- dependency-name: fumadocs-ui
  dependency-version: 16.4.10
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: patch-updates
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

apps/site/package.json

@@ -10,11 +10,11 @@
     "lint": "next lint"
   },
   "dependencies": {
-    "fumadocs-core": "^16.4.7",
+    "fumadocs-core": "^16.4.10",
     "fumadocs-docgen": "^3.0.5",
     "fumadocs-mdx": "^14.2.6",
     "fumadocs-twoslash": "^3.1.12",
-    "fumadocs-ui": "^16.4.7",
+    "fumadocs-ui": "^16.4.10",
     "lucide-react": "^0.562.0",
     "next": "^16.1.4",
     "react": "^19.0.0",