Update ktor2 to v2.3.13 (#16)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ kotlin = "2.0.20"
 jdkTarget = "8"
 jvmToolchain = "21"
 kotlinTarget = "1.9.0"
-ktor2 = "2.3.12"
+ktor2 = "2.3.13"
 ktor3 = "3.0.0"
 kotlinx-serialization = "1.7.1"
 kotlinx-datetime = "0.6.1"