Update dependency yarnpkg/yarn to v1.22.21

This MR contains the following updates:

Package	Type	Update	Change
yarnpkg/yarn	ironbank-github	patch	v1.22.20 -> v1.22.21

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Release Notes

yarnpkg/yarn

v1.22.21

Compare Source

[!WARNING] This release is missing a couple of artifacts (the .msi/.rpm/.deb/.asc files); we're working on fixing this.

• Fixes an issue in the v1.22.20 when calling Yarn from a project subfolder, outside of a Corepack context.

• Added a SKIP_YARN_COREPACK_CHECK environment variable to skip the Corepack check.

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