[Snyk] Security upgrade nodebb-plugin-markdown from 10.1.1 to 13.2.0

[zhijinwuu]

Snyk has created this PR to fix 1 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• install/package.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Infinite loop SNYK-JS-MARKDOWNIT-6483324	696

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