fix: operation name should be without "operation" sufix

Author: bercianor

core/flamingock-core/src/main/java/io/flamingock/internal/core/builder/runner/CliRunner.java

@@ -92,7 +92,7 @@ public void run() {
 
     private void writeResponse(AbstractOperationResult result, Throwable error, long durationMs) {
         ResponseEnvelope envelope;
-        String operationName = flamingockArgs.getOperation().isPresent() ? flamingockArgs.getOperation().get().name() : "unknown operation";
+        String operationName = flamingockArgs.getOperation().isPresent() ? flamingockArgs.getOperation().get().name() : "unknown";
 
         if (error != null) {
             envelope = ResponseEnvelope.failure(operationName, ResponseError.from(error), durationMs);