Update x-pack/plugin/transform/src/main/java/org/elasticsearch/xpack/…

…transform/transforms/TransformIndexer.java

Co-authored-by: Benjamin Trent <ben.w.trent@gmail.com>

x-pack/plugin/transform/src/main/java/org/elasticsearch/xpack/transform/transforms/TransformIndexer.java

@@ -359,7 +359,7 @@ protected void initializeFunction() {
                 auditor.warning(
                     getJobId(),
                     "could not find any optimizations for continuous execution, "
-                        + "this transform might run slow, please check your configuration."
+                        + "this transform might run slowly, please check your configuration."
                 );
             }
         }