🤖 Update module github.com/stackitcloud/stackit-sdk-go/services/dns to v0.21.0#157

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mainstackitcloud/gardener-extension-provider-stackit:mainfrom

renovate/github.com-stackitcloud-stackit-sdk-go-services-dns-0.xstackitcloud/gardener-extension-provider-stackit:renovate/github.com-stackitcloud-stackit-sdk-go-services-dns-0.xCopy head branch name to clipboard