meta: bump the mdx group with 5 updates

Bumps the mdx group with 5 updates:

| Package | From | To |
| --- | --- | --- |
| [@shikijs/core](https://github.com/shikijs/shiki/tree/HEAD/packages/core) | `3.8.1` | `3.12.0` |
| [@shikijs/engine-javascript](https://github.com/shikijs/shiki/tree/HEAD/packages/engine-javascript) | `3.8.1` | `3.12.0` |
| [@shikijs/engine-oniguruma](https://github.com/shikijs/shiki/tree/HEAD/packages/engine-oniguruma) | `3.8.1` | `3.12.0` |
| [shiki](https://github.com/shikijs/shiki/tree/HEAD/packages/shiki) | `3.8.1` | `3.12.0` |
| [@mdx-js/mdx](https://github.com/mdx-js/mdx/tree/HEAD/packages/mdx) | `3.1.0` | `3.1.1` |


Updates `@shikijs/core` from 3.8.1 to 3.12.0
- [Release notes](https://github.com/shikijs/shiki/releases)
- [Commits](https://github.com/shikijs/shiki/commits/v3.12.0/packages/core)

Updates `@shikijs/engine-javascript` from 3.8.1 to 3.12.0
- [Release notes](https://github.com/shikijs/shiki/releases)
- [Commits](https://github.com/shikijs/shiki/commits/v3.12.0/packages/engine-javascript)

Updates `@shikijs/engine-oniguruma` from 3.8.1 to 3.12.0
- [Release notes](https://github.com/shikijs/shiki/releases)
- [Commits](https://github.com/shikijs/shiki/commits/v3.12.0/packages/engine-oniguruma)

Updates `shiki` from 3.8.1 to 3.12.0
- [Release notes](https://github.com/shikijs/shiki/releases)
- [Commits](https://github.com/shikijs/shiki/commits/v3.12.0/packages/shiki)

Updates `@mdx-js/mdx` from 3.1.0 to 3.1.1
- [Release notes](https://github.com/mdx-js/mdx/releases)
- [Changelog](https://github.com/mdx-js/mdx/blob/main/changelog.md)
- [Commits](https://github.com/mdx-js/mdx/commits/3.1.1/packages/mdx)

---
updated-dependencies:
- dependency-name: "@shikijs/core"
  dependency-version: 3.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: mdx
- dependency-name: "@shikijs/engine-javascript"
  dependency-version: 3.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: mdx
- dependency-name: "@shikijs/engine-oniguruma"
  dependency-version: 3.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: mdx
- dependency-name: shiki
  dependency-version: 3.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: mdx
- dependency-name: "@mdx-js/mdx"
  dependency-version: 3.1.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: mdx
...

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

Author: dependabot[bot]

apps/site/package.json

@@ -34,7 +34,7 @@
   },
   "dependencies": {
     "@heroicons/react": "~2.2.0",
-    "@mdx-js/mdx": "^3.1.0",
+    "@mdx-js/mdx": "^3.1.1",
     "@node-core/rehype-shiki": "workspace:*",
     "@node-core/ui-components": "workspace:*",
     "@node-core/website-i18n": "workspace:*",

packages/rehype-shiki/package.json

@@ -20,12 +20,12 @@
     "test:unit": "cross-env NODE_NO_WARNINGS=1 node --experimental-test-coverage --experimental-test-module-mocks --test \"**/*.test.mjs\""
   },
   "dependencies": {
-    "@shikijs/core": "^3.8.1",
-    "@shikijs/engine-javascript": "^3.8.1",
-    "@shikijs/engine-oniguruma": "^3.8.1",
+    "@shikijs/core": "^3.12.0",
+    "@shikijs/engine-javascript": "^3.12.0",
+    "@shikijs/engine-oniguruma": "^3.12.0",
     "classnames": "catalog:",
     "hast-util-to-string": "^3.0.1",
-    "shiki": "~3.8.1",
+    "shiki": "~3.12.0",
     "unist-util-visit": "^5.0.0"
   },
   "devDependencies": {