upgrade refactor to fix prismjs CVE[0]

[0] https://github.com/advisories/GHSA-hqhp-5p83-hx96

package.json

@@ -45,7 +45,7 @@
     "hast-util-to-html": "^8.0.1",
     "hast-util-to-string": "^2.0.0",
     "parse-numeric-range": "^1.3.0",
-    "refractor": "^4.1.1",
+    "refractor": "^4.2.1",
     "rehype-parse": "^8.0.2",
     "unified": "^10.1.0",
     "unist-util-filter": "^4.0.0",