fix: load reviewer for pull review dismiss action notifier

This was implicitly loaded during the mail notifications notifier. If
you disable mail notifications on Forgejo then this will result in the
reviewer not being loaded and NPE.

services/feed/action.go

@@ -308,6 +308,10 @@ func (*actionNotifier) AutoMergePullRequest(ctx context.Context, doer *user_mode
 }
 
 func (*actionNotifier) PullReviewDismiss(ctx context.Context, doer *user_model.User, review *issues_model.Review, comment *issues_model.Comment) {
+	if err := review.LoadReviewer(ctx); err != nil {
+		log.Error("LoadReviewer '%d/%d': %v", review.ID, review.ReviewerID, err)
+		return
+	}
 	reviewerName := review.Reviewer.Name
 	if len(review.OriginalAuthor) > 0 {
 		reviewerName = review.OriginalAuthor