Bump io.projectreactor:reactor-bom from 2025.0.0-M6 to 2025.0.0-SNAPSHOT (#4065)

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

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

build.gradle

@@ -67,7 +67,7 @@ ext {
 	micrometerVersion = '1.16.0-SNAPSHOT'
 	micrometerTracingVersion = '1.6.0-M2'
 	mockitoVersion = '5.19.0'
-	reactorVersion = '2025.0.0-M6'
+	reactorVersion = '2025.0.0-SNAPSHOT'
 	scalaVersion = '2.13'
 	springBootVersion = '3.5.0' // docs module
 	springDataVersion = '2025.1.0-M5'