Bump prismjs from 1.24.0 to 1.25.0 in /site (#1798)

Bumps [prismjs](https://github.com/PrismJS/prism) from 1.24.0 to 1.25.0.
- [Release notes](https://github.com/PrismJS/prism/releases)
- [Changelog](https://github.com/PrismJS/prism/blob/master/CHANGELOG.md)
- [Commits](PrismJS/prism@v1.24.0...v1.25.0)

---
updated-dependencies:
- dependency-name: prismjs
  dependency-type: direct:production
...

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site/package.json

@@ -15,7 +15,7 @@
     "highlight.js": "^10.4.1",
     "marked": "^0.7.0",
     "polka": "^0.5.2",
-    "prismjs": "^1.24.0",
+    "prismjs": "^1.25.0",
     "sirv": "^1.0.0"
   },
   "devDependencies": {