Update dependency org.jetbrains.kotlinx:kotlinx-serialization-json to v1.11.0 (#163)

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

Author: renovate[bot]

backend/gradle/libs.versions.toml

@@ -10,7 +10,7 @@ kotlin_logging = "8.0.01"
 kotlin = "2.3.20"
 kotlinter = "5.4.2"
 kotlinx_coroutines = "1.10.2"
-kotlinx_serialization = "1.10.0"
+kotlinx_serialization = "1.11.0"
 ktor = "3.4.2"
 logback = "1.5.32"
 prometheus = "1.16.4"