Update module github.com/go-acme/lego/v4 to v4.9.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/go-acme/lego/v4	require	patch	v4.9.0 -> v4.9.1

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Release Notes

go-acme/lego

v4.9.1

Compare Source

Changed:

• [lib,cname] cname: add log about CNAME entries
• [dnsprovider] regru: improve error handling

Fixed:

• [dnsprovider,cname] fix CNAME support for multiple DNS providers
• [dnsprovider,cname] duckdns: fix CNAME support
• [dnsprovider,cname] oraclecloud: use fqdn to resolve zone
• [dnsprovider] hurricane: fix CNAME support
• [lib,cname] cname: stop trying to traverse cname if none have been found

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