chore(deps): update dependency yaml to ^2.6.1

[tradeshift-renovate]

This PR contains the following updates:

Package	Type	Update	Change
yaml (source)	devDependencies	minor	^2.1.3 -> ^2.6.1

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Release Notes

eemeli/yaml (yaml)

v2.6.1

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• Do not strip :00 seconds from !!timestamp values (#​578, with thanks to @​qraynaud)
• Tighten regexp for JSON !!bool (#​587, with thanks to @​vra5107)
• Default to literal block scalar if folded would overflow (#​585)

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

v2.5.1

Compare Source

• Include range in flow sequence pair maps (#​573)

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