Bump spring-boot-starter-webflux from 2.4.2 to 2.5.12

Bumps [spring-boot-starter-webflux](https://github.com/spring-projects/spring-boot) from 2.4.2 to 2.5.12.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v2.4.2...v2.5.12)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-webflux
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -105,7 +105,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-starter-webflux</artifactId>
-                <version>2.4.2</version>
+                <version>2.5.12</version>
             </dependency>
             <dependency>
                 <groupId>org.springframework.cloud</groupId>