Update dependency nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect (source)	3.4.0 → 4.0.1

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Release Notes

ultraq/thymeleaf-layout-dialect (nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect)

v4.0.1

Compare Source

• Fixed the new LayoutDialect(SortingStrategy) configuration constructor
  failing to report as deprecated - all configuration constructors were
  deprecated in 4.0.0

v4.0.0

Compare Source

• Made to align with Spring Boot 4 (#​246)
  this changes the minimum support targets to:
  • Java 17
  • Groovy 5
  • Gradle 9 (for building the project)
• Any workarounds made for older versions of Java have been removed from the
  codebase
• Remove deprecated layout:collect processor

Version 4.0 of the layout dialect is made to align with Spring Boot 4's build
and dependency targets, and so is built for Java 17, Groovy 5, and Gradle 9 (for
building the project).

A migration guide can be found on the documentation site:
https://ultraq.github.io/thymeleaf-layout-dialect/migrating-to-4.0/

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