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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -23,7 +23,7 @@ commons-text = "1.13.0"
 guava = "33.4.5-jre"
 commonmark = "0.24.0"
 
-micronaut = "4.8.7"
+micronaut = "4.8.8"
 micronaut-platform = "4.7.6"
 micronaut-jaxrs = "4.8.0"
 micronaut-security = "4.12.0"