fix(deps): update dependency io.micronaut.security:micronaut-security-bom to v4.8.0 (#716)

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

Author: renovate[bot]

Diff for: gradle/libs.versions.toml

@@ -16,7 +16,7 @@ bcpkix = "1.70"
 managed-jetty = '11.0.21'
 
 micronaut-reactor = "3.3.0"
-micronaut-security = "4.7.0"
+micronaut-security = "4.8.0"
 micronaut-serde = "2.9.0"
 micronaut-session = "4.3.0"
 micronaut-validation = "4.5.0"