Fix notification message when admin label was modified

app/controllers/admin/labels_controller.rb

@@ -29,7 +29,7 @@ class Admin::LabelsController < Admin::ApplicationController
     @label = Labels::UpdateService.new(label_params).execute(@label)
 
     if @label.valid?
-      redirect_to admin_labels_path, notice: 'label was successfully updated.'
+      redirect_to admin_labels_path, notice: 'Label was successfully updated.'
     else
       render :edit
     end