[rush] @microsoft/rush-lib depends on a version of js-yaml that has a security issue

[kgetz-arista]

Today, @microsoft/rush-lib depends on version "~4.1.0" of js-yaml:

https://github.com/microsoft/rushstack/blob/main/libraries/rush-lib/package.json#L71C16-L71C24

This version has a security issue: GHSA-h67p-54hq-rp68

@microsoft/rush-lib needs to be updated to use 4.2.x instead.