Bump io.projectreactor:reactor-bom from 2023.0.3 to 2023.0.4 (#3129)

Bumps [io.projectreactor:reactor-bom](https://github.com/reactor/reactor) from 2023.0.3 to 2023.0.4.
- [Release notes](https://github.com/reactor/reactor/releases)
- [Commits](reactor/reactor@2023.0.3...2023.0.4)

---
updated-dependencies:
- dependency-name: io.projectreactor:reactor-bom
  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

@@ -66,7 +66,7 @@ ext {
 	micrometerVersion = '1.13.0-SNAPSHOT'
 	micrometerTracingVersion = '1.3.0-SNAPSHOT'
 	mockitoVersion = '5.8.0'
-	reactorVersion = '2023.0.3'
+	reactorVersion = '2023.0.4'
 	scalaVersion = '2.13'
 	springBootVersion = '3.2.3' // docs module
 	springDataVersion = '2024.0.0-SNAPSHOT'