Bump io.projectreactor:reactor-bom from 2025.0.0-M5 to 2025.0.0-M6

Bumps [io.projectreactor:reactor-bom](https://github.com/reactor/reactor) from 2025.0.0-M5 to 2025.0.0-M6.
- [Release notes](https://github.com/reactor/reactor/releases)
- [Commits](reactor/reactor@2025.0.0-M5...2025.0.0-M6)

---
updated-dependencies:
- dependency-name: io.projectreactor:reactor-bom
  dependency-version: 2025.0.0-M6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -30,7 +30,7 @@ commons-collections = "commons-collections:commons-collections:3.2.2"
 io-micrometer-context-propagation = "io.micrometer:context-propagation:1.1.3"
 io-micrometer-micrometer-observation = "io.micrometer:micrometer-observation:1.14.9"
 io-mockk = "io.mockk:mockk:1.14.5"
-io-projectreactor-reactor-bom = "io.projectreactor:reactor-bom:2025.0.0-M5"
+io-projectreactor-reactor-bom = "io.projectreactor:reactor-bom:2025.0.0-M6"
 io-rsocket-rsocket-bom = { module = "io.rsocket:rsocket-bom", version.ref = "io-rsocket" }
 io-spring-javaformat-spring-javaformat-checkstyle = { module = "io.spring.javaformat:spring-javaformat-checkstyle", version.ref = "io-spring-javaformat" }
 io-spring-javaformat-spring-javaformat-gradle-plugin = { module = "io.spring.javaformat:spring-javaformat-gradle-plugin", version.ref = "io-spring-javaformat" }