Bump org.springframework.security:spring-security-bom

Bumps [org.springframework.security:spring-security-bom](https://github.com/spring-projects/spring-security) from 6.5.3 to 6.5.5.
- [Release notes](https://github.com/spring-projects/spring-security/releases)
- [Changelog](https://github.com/spring-projects/spring-security/blob/main/RELEASE.adoc)
- [Commits](spring-projects/spring-security@6.5.3...6.5.5)

---
updated-dependencies:
- dependency-name: org.springframework.security:spring-security-bom
  dependency-version: 6.5.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

dependencies/build.gradle

@@ -23,7 +23,7 @@ dependencies {
 		api platform("org.springframework:spring-framework-bom:7.0.0-M8")
 		api platform("org.springframework.data:spring-data-bom:2025.0.3")
 	}
-	api platform("org.springframework.security:spring-security-bom:6.5.3")
+	api platform("org.springframework.security:spring-security-bom:6.5.5")
 	api platform('com.fasterxml.jackson:jackson-bom:2.20.0')
 	api platform("io.micrometer:micrometer-bom:1.15.4")
 	api platform("io.micrometer:micrometer-tracing-bom:1.5.4")