Fix generation of NodeJS API documentation

NodeJS API docs are out of sync with NodeJS C++ wrapper documentation
due to the doc build breaking back in #4043.

The commit fixes the Node dev dependencies such that `npm run docs`
works again and re-enables the check in CI.

.github/workflows/osrm-backend.yml

@@ -46,8 +46,7 @@ jobs:
         ./scripts/check_taginfo.py taginfo.json profiles/car.lua
         ./scripts/format.sh && ./scripts/error_on_dirty.sh
         node ./scripts/validate_changelog.js
-        # See issue 4043
-        #- npm run docs && ./scripts/error_on_dirty.sh
+        npm run docs && ./scripts/error_on_dirty.sh
 
   build-test-publish:
     needs: format-taginfo-docs