chore(deps): bump rehype-citation from 2.0.0 to 2.1.1 (#1341)

Bumps [rehype-citation](https://github.com/timlrx/rehype-citation) from 2.0.0 to 2.1.1.
- [Release notes](https://github.com/timlrx/rehype-citation/releases)
- [Commits](https://github.com/timlrx/rehype-citation/compare/v2.0.0...v2.1.1)

---
updated-dependencies:
- dependency-name: rehype-citation
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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package.json

@@ -64,7 +64,7 @@
     "pretty-time": "^1.1.0",
     "reading-time": "^1.5.0",
     "rehype-autolink-headings": "^7.1.0",
-    "rehype-citation": "^2.0.0",
+    "rehype-citation": "^2.1.1",
     "rehype-katex": "^7.0.0",
     "rehype-mathjax": "^6.0.0",
     "rehype-pretty-code": "^0.13.2",