fix(deps): update dependency io.micronaut:micronaut-core-bom to v4.8.9 (#506)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -7,7 +7,7 @@ arquillian-container = "1.9.3.Final"
 javax-annotation-api = "1.3.2"
 jakarta-validation-tck = "3.0.1"
 
-micronaut = "4.8.8"
+micronaut = "4.8.9"
 micronaut-platform = "4.7.5"
 micronaut-docs = "2.0.0"
 micronaut-test = "4.6.2"