Bump spring from 6.1.11 to 6.1.12 (#789)

Bumps `spring` from 6.1.11 to 6.1.12.

Updates `org.springframework:spring-framework-bom` from 6.1.11 to 6.1.12
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v6.1.11...v6.1.12)

Updates `org.springframework:spring-test` from 6.1.11 to 6.1.12
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v6.1.11...v6.1.12)

---
updated-dependencies:
- dependency-name: org.springframework:spring-framework-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-test
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/libs.versions.toml

@@ -12,7 +12,7 @@ protobuf = "3.21.12"
 pulsar = "3.1.3"
 pulsar-reactive = "0.5.6"
 reactor = "2023.0.9"
-spring = "6.1.11"
+spring = "6.1.12"
 # tests
 assertj = "3.25.3"
 awaitility = "4.2.2"