1.21.2

🚀 New features and improvements

• Add support for yamlMergeStrategy in declarative pipelines (#638) @nlebas

🐛 Bug Fixes

• JENKINS-60055 - NoDelayProvisionerStrategy needs to call CloudProvisionerListener (#637) @Vlatombe

👻 Maintenance

• Fix wording and typos in No delay provisioning section (#639) @CharlieTLe
• removes to defaultContainer option from examples to demonstrate default behavior (#634) @marshallford