chore(deps): update dependency yaml to v2.6.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
yaml (source)	2.5.1 -> 2.6.0

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Release Notes

eemeli/yaml (yaml)

v2.6.0

Compare Source

• Use a proper tag for !!merge << keys (#​580)
• Add stringKeys parse option (#​581)
• Stringify a Document as a Document (#​576)
• Add sponsorship by Manifest

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