KTOR-9507 Update netty to 4.2.12

Author: osipxd

gradle/libs.versions.toml

@@ -14,8 +14,8 @@ kover = "0.9.4"
 kotlinter = "5.2.0"
 kotlinx-browser = "0.5.0"
 
-netty = "4.2.9.Final"
-netty-tcnative = "2.0.74.Final"
+netty = "4.2.12.Final"
+netty-tcnative = "2.0.76.Final"
 
 jetty = "9.4.58.v20250814"
 jetty-jakarta = "12.0.29"