Update @ckeditor/ckeditor5-list to v34.0.1

Problem/Motivation

#3274767: Update to CKEditor 5 v34.0.0 got us on CKEditor 5 v34.0.0.

But the ckeditor5-list package's DLL build did not include the DocumentList plugin, only the List plugin. We need DocumentList. For example for the #3274651: Impossible to enable <ol type> or <ul type> with GHS stable blocker.

https://github.com/ckeditor/ckeditor5/releases/tag/v34.0.1 does not exist, only https://github.com/ckeditor/ckeditor5/releases/tag/v34.0.0.

Only https://www.npmjs.com/package/@ckeditor/ckeditor5-list got a 34.0.1 release, just for us, so we can start using DocumentList.

This hard-blocks the stable blocker #3274651, see #3274651-6: Impossible to enable <ol type> or <ul type> with GHS.

Proposed resolution

1. core/package.json
2. cd core
3. yarn install
4. yarn run vendor-update
5. yarn run build:ckeditor5
6. yarn run build:ckeditor5-types

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet

N/A