fix(deps): update dependency io.rest-assured:rest-assured to v6

Author: renovate[bot]

build.gradle.kts

@@ -17,7 +17,7 @@ dependencies {
     // Security dependency removed for this example application
     implementation("io.quarkus:quarkus-arc")
     testImplementation("io.quarkus:quarkus-junit5")
-    testImplementation("io.rest-assured:rest-assured:5.3.0")
+    testImplementation("io.rest-assured:rest-assured:6.0.0")
 
     // OpenAPI/Swagger support
     implementation("io.quarkus:quarkus-smallrye-openapi")