meta: bump shiki from 3.1.0 to 3.3.0 in the mdx group (#7724)

Bumps the mdx group with 1 update: [shiki](https://github.com/shikijs/shiki/tree/HEAD/packages/shiki).


Updates `shiki` from 3.1.0 to 3.3.0
- [Release notes](https://github.com/shikijs/shiki/releases)
- [Commits](https://github.com/shikijs/shiki/commits/v3.3.0/packages/shiki)

---
updated-dependencies:
- dependency-name: shiki
  dependency-version: 3.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: mdx
...

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Author: dependabot[bot]

apps/site/package.json

@@ -66,7 +66,7 @@
     "remark-gfm": "~4.0.1",
     "remark-reading-time": "~2.0.1",
     "semver": "~7.7.1",
-    "shiki": "~3.1.0",
+    "shiki": "~3.3.0",
     "sval": "^0.6.3",
     "tailwindcss": "~4.0.17",
     "unist-util-visit": "~5.0.0",