build(deps): bump puppeteer from 5.4.1 to 5.5.0 in /docs (#1614)

Author: dependabot[bot]

docs/package-lock.json

@@ -41,7 +41,7 @@
     "polished": "^4.0.5",
     "prism-react-renderer": "^1.1.1",
     "prop-types": "^15.7.2",
-    "puppeteer": "^5.4.1",
+    "puppeteer": "^5.5.0",
     "react": "^16.14.0",
     "react-dom": "^16.12.0",
     "react-headroom": "^3.0.1",