fix(deps): update dependency io.micronaut.serde:micronaut-serde-bom to v2.15.4

Author: renovate[bot]

gradle/libs.versions.toml

@@ -14,7 +14,7 @@ sonatype-scan = "3.1.1"
 
 # Micronaut BOMs
 micronaut-reactor = "3.7.0"
-micronaut-serde = "2.15.0"
+micronaut-serde = "2.15.4"
 micronaut-logging = "1.7.0"
 [libraries]
 # Core