Update meta-marked to latest version

Meta-marked 0.4.4 which we used from our git repository contains a
RegexDOS attack in the marked dependency. The dependency was already
updated in our meta-marked repository, but not updated in yarn.

This made us still vulnerable to this ReDOS which was able to cause a
DOS attack on the server when updating a note.

For Details:

https://github.com/markedjs/marked/releases/tag/v0.7.0
https://github.com/markedjs/marked/pull/1515

What is a ReDOS?

A ReDOS attack is a DOS attack where an attacker targets a
not-well-written Regular Expression. Regular expressions try to build a
tree of all possibilities it can match in order to figure out if the
given statement is valid or not. A ReDOS attack abuses this concept by
providing a statement that doesn't match but causes extremly huge trees
that simply lead to exhausting CPU usage.

For more details see: https://www.owasp.org/index.php/Regular_expression_Denial_of_Service_-_ReDoS

Credit:

Huge thanks to @bitinerant for finding this and handling it with a
responsible disclosure.

Also thanks to the `marked`-team for fixing things already.

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

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