Processors.ts - add ecs_compatibility to GrokProcessor

Author: andrewkroh

specification/ingest/_types/Processors.ts

@@ -908,6 +908,12 @@ export class ForeachProcessor extends ProcessorBase {
 }
 
 export class GrokProcessor extends ProcessorBase {
+  /**
+   * Must be disabled or v1. If v1, the processor uses patterns with Elastic
+   * Common Schema (ECS) field names.
+   * @server-default disabled
+   */
+  ecs_compatibility?: string
   /**
    * The field to use for grok expression parsing.
    */