Update ktor monorepo to v3.4.2 (#152)

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

Author: renovate[bot]

backend/gradle/libs.versions.toml

@@ -11,7 +11,7 @@ kotlin = "2.3.20"
 kotlinter = "5.4.2"
 kotlinx_coroutines = "1.10.2"
 kotlinx_serialization = "1.10.0"
-ktor = "3.4.1"
+ktor = "3.4.2"
 logback = "1.5.32"
 prometheus = "1.16.4"
 serialization = "2.3.20"