fix(deps): update dependency io.micronaut:micronaut-core-bom to v4.8.8

Author: renovate[bot]

gradle/libs.versions.toml

@@ -16,7 +16,7 @@ jmh = "1.37"
 groovy = "4.0.22"
 lombok = "1.18.36"
 
-micronaut = "4.8.7"
+micronaut = "4.8.8"
 micronaut-platform = "4.7.6"
 micronaut-docs = "2.0.0"
 micronaut-test = "4.6.2"