Bump puppeteer from 5.5.0 to 8.0.0 in /services/pdfx

Bumps [puppeteer](https://github.com/puppeteer/puppeteer) from 5.5.0 to 8.0.0.
- [Release notes](https://github.com/puppeteer/puppeteer/releases)
- [Changelog](https://github.com/puppeteer/puppeteer/blob/main/CHANGELOG.md)
- [Commits](puppeteer/puppeteer@v5.5.0...v8.0.0)

Signed-off-by: dependabot[bot] <support@github.com>

services/pdfx/package.json

@@ -21,7 +21,7 @@
     "babel-preset-env": "^1.7.0",
     "parcel-bundler": "^1.12.5",
     "sass": "^1.32.0",
-    "puppeteer": "^5.5.0",
+    "puppeteer": "^8.0.0",
     "typescript": "^4.2.3",
     "vue-hot-reload-api": "^2.3.4",
     "vue-template-compiler": "^2.6.12"