fix(deps): update dependency org.springdoc:springdoc-openapi-starter-webmvc-ui to v2.8.9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.springdoc:springdoc-openapi-starter-webmvc-ui (source)	2.8.8 -> 2.8.9

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Release Notes

springdoc/springdoc-openapi (org.springdoc:springdoc-openapi-starter-webmvc-ui)

v2.8.9

Added

• #​2944 - Support for @​Positive
• #​3011 - type-use for method parameters

Changed

• Upgrade spring-boot to version 3.5.0

Fixed

• #​2982 - application/problem+json content type is not set for ProblemDetails
• #​2990 - Issues with POST Request, application/x-www-form-urlencoded and only one parameter
• #​2998 - io.swagger.v3.oas.annotations.Webhook does not work when defined on the method level
• #​3012 - Order of examples is (sometimes) not preserved

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