bump netty version

Author: ezhang6811

dependencyManagement/build.gradle.kts

@@ -42,7 +42,7 @@ val dependencyBoms = listOf(
   "io.grpc:grpc-bom:1.59.1",
   // netty-bom is a fix for CVE-2025-55163 (https://github.com/advisories/GHSA-prj3-ccx8-p6x4).
   // Remove once https://github.com/aws/aws-sdk-java-v2/pull/6344 is released.
-  "io.netty:netty-bom:4.1.124.Final",
+  "io.netty:netty-bom:4.1.126.Final",
   "io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha:$otelAlphaVersion",
   "org.apache.logging.log4j:log4j-bom:2.21.1",
   "org.junit:junit-bom:5.10.1",