Cosmetics: Rename local variable in lambda.

Change-Id: I43165e7aa3bc0a7851dc80e57d9db1a7aa949df7
diff --git a/java/com/google/gerrit/server/PublishCommentUtil.java b/java/com/google/gerrit/server/PublishCommentUtil.java
index c446c92..f1c2f82 100644
--- a/java/com/google/gerrit/server/PublishCommentUtil.java
+++ b/java/com/google/gerrit/server/PublishCommentUtil.java
@@ -125,8 +125,8 @@
     ImmutableList.Builder<CommentValidationFailure> commentValidationFailures =
         new ImmutableList.Builder<>();
     commentValidators.runEach(
-        listener ->
-            commentValidationFailures.addAll(listener.validateComments(commentsForValidation)));
+        validator ->
+            commentValidationFailures.addAll(validator.validateComments(commentsForValidation)));
     return commentValidationFailures.build();
   }
 }