webflux-ui doesn't work with springboot 4

[maliffi]

Describe the bug
springdoc-openapi-starter-webflux-ui version Version 2.8.15 doesn't work with springboot 4.
The reason is that SwaggerConfig search for bean org.springframework.boot.autoconfigure.web.reactive.WebFluxProperties but in spring boot 4 it has been moved to org.springframework.boot.webflux.autoconfigure.WebFluxProperties

To Reproduce
Steps to reproduce the behavior:

• Use spring-boot-starter-parent version 4.0.1
• Add dependencies:
  • springdoc-openapi-starter-webflux-api and springdoc-openapi-starter-webflux-ui version 2.8.15

Expected behavior

• Application starts normally, v3/api/docs and swagger/ui are available

[Mattias-Sehlstedt]

Springboot 4 requires springdoc 3.x.x. Please see https://springdoc.org/#what-is-the-compatibility-matrix-of-springdoc-openapi-with-spring-boot