Update ktor monorepo to v3.2.3

Author: renovate[bot]

backend/build.gradle.kts

@@ -22,11 +22,11 @@ kotlin {
             implementation(libs.kotlinx.coroutines)
             implementation(libs.kotlinx.serialization)
 
-            implementation("io.ktor:ktor-server-core:3.2.1")
-            implementation("io.ktor:ktor-server-netty:3.2.1")
-            implementation("io.ktor:ktor-server-cors:3.2.1")
-            implementation("io.ktor:ktor-serialization-kotlinx-json:3.2.1")
-            implementation("io.ktor:ktor-server-content-negotiation:3.2.1")
+            implementation("io.ktor:ktor-server-core:3.2.3")
+            implementation("io.ktor:ktor-server-netty:3.2.3")
+            implementation("io.ktor:ktor-server-cors:3.2.3")
+            implementation("io.ktor:ktor-serialization-kotlinx-json:3.2.3")
+            implementation("io.ktor:ktor-server-content-negotiation:3.2.3")
 
             implementation("ch.qos.logback:logback-classic:1.5.8")