chore(deps): bump rehype-pretty-code from 0.12.3 to 0.12.6 (#741)

Bumps [rehype-pretty-code](https://github.com/atomiks/rehype-pretty-code) from 0.12.3 to 0.12.6.
- [Release notes](https://github.com/atomiks/rehype-pretty-code/releases)
- [Commits](https://github.com/atomiks/rehype-pretty-code/compare/v0.12.3...v0.12.6)

---
updated-dependencies:
- dependency-name: rehype-pretty-code
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -65,7 +65,7 @@
     "rehype-autolink-headings": "^7.1.0",
     "rehype-katex": "^7.0.0",
     "rehype-mathjax": "^5.0.0",
-    "rehype-pretty-code": "^0.12.3",
+    "rehype-pretty-code": "^0.12.6",
     "rehype-raw": "^7.0.0",
     "rehype-slug": "^6.0.0",
     "remark": "^15.0.1",