Fix uncaught error: Can’t apply message of unknown type: 8 on rumors-site

[nonumpa]

Error on rumors-site that may break transcript function

Reproduce steps: find an article with a transcript, edit the transcript.

Root cause:
It's because we upgraded hocuspocus/server to 2.7.1 in package-lock by accident.

And newer version adds a new MessageType which old client does not know

[github-actions]

Pull Request Test Coverage Report for Build 7629203973

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.063%

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Totals
Change from base Build 7474142357:	0.0%
Covered Lines:	44
Relevant Lines:	45

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💛 - Coveralls

[johnson-liang]

Tried editing transcript on https://cofacts.tw/article/8feyM40BAjOeMOkl0o4M and it does not break. Is there any particular steps needed to trigger the error?

Also, should we downgrade as in this PR, or should we update client in rumors-site instead?

[nonumpa]

It seems to only break in my devlopment env, and in production, it just keeps logging the error.

I thought it also broke in production, and downgrading is the faster and safer way to fix the bug.
Now I can try to sync the hocuspocus/server version in package.json and upgrade the provider in rumors-stie.