Update dependency org.yaml:snakeyaml to v2.6

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.yaml:snakeyaml	2.0 → 2.6

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⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
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The artifact failure details are included below:

File name: gradle/libs.versions.toml

Post-upgrade command './gradlew --write-verification-metadata pgp,sha256 --export-keys help' has not been added to the allowed list in allowedCommands