Node-RED 4.0.1 release notes

What’s Changed

Remove default user agent by @Steve-Mcl in https://github.com/node-red/node-red/pull/4791
Add Japanese translations for v4.0.0 by @kazuhitoyokoi in https://github.com/node-red/node-red/pull/4785
Add tooltip for number of subflow instance on info tab by @kazuhitoyokoi in https://github.com/node-red/node-red/pull/4786
Fix the config node select value assignment by @GogoVega in https://github.com/node-red/node-red/pull/4788
UI proxy should setup agents for both http_proxy and https_proxy by @Steve-Mcl in https://github.com/node-red/node-red/pull/4794
make using msg.parts optional in join node by @dceejay in https://github.com/node-red/node-red/pull/4796
Use _ADD_ value for both add new... and none options by @GogoVega in https://github.com/node-red/node-red/pull/4800
Ensure subflow instance credential property values are extracted by @knolleary in https://github.com/node-red/node-red/pull/4802
Ensure group nodes are properly exported in /flow api by @knolleary in https://github.com/node-red/node-red/pull/4803
Update for 4.0.1 release by @knolleary in https://github.com/node-red/node-red/pull/4804

Full Changelog: https://github.com/node-red/node-red/compare/4.0.0…4.0.1