build(deps-dev): bump spring-boot-starter-webflux

Bumps [spring-boot-starter-webflux](https://github.com/spring-projects/spring-boot) from 2.5.5 to 2.5.12.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.5.5...v2.5.12)

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

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

Author: dependabot[bot]

server/openblocks-plugins/graphqlPlugin/pom.xml

@@ -107,7 +107,7 @@
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-webflux</artifactId>
-            <version>2.5.5</version>
+            <version>2.5.12</version>
             <scope>test</scope>
         </dependency>
         <dependency>