[Snyk] Security upgrade @asyncapi/generator from 1.8.23 to 1.9.0

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `yarn` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • package.json
  • yarn.lock

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	479/1000 Why? Has a fix available, CVSS 5.3	Regular Expression Denial of Service (ReDoS) SNYK-JS-MARKDOWNIT-2331914	No	No Known Exploit
	586/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 5.3	Regular Expression Denial of Service (ReDoS) SNYK-JS-MARKDOWNIT-459438	No	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Check the changes in this PR to ensure they won't cause issues with your project.

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[ops-github-DU4JOAWE]

This change is