fix(deps): update dependency io.micronaut:micronaut-core-bom to v4.7.6

Author: renovate[bot]

gradle/libs.versions.toml

@@ -16,7 +16,7 @@
 # a managed version (a version which alias starts with "managed-"
 
 [versions]
-micronaut = "4.7.5"
+micronaut = "4.7.6"
 micronaut-platform = "4.6.3"
 micronaut-aot = "2.5.0"
 micronaut-aws = "4.8.0"