updated logger warnings

pipeline/templatetags/pipeline.py

@@ -98,7 +98,7 @@ class StylesheetNode(PipelineMixin, template.Node):
         try:
             package = self.package_for(package_name, 'css')
         except PackageNotFound:
-            logger.warn("Package %r is unknown. Check PIPELINE_CSS in your settings.", package_name)
+            logger.warn("Package %r is unknown. Check PIPELINE['STYLESHEETS'] in your settings.", package_name)
             return ''  # fail silently, do not return anything if an invalid group is specified
         return self.render_compressed(package, package_name, 'css')
 
@@ -131,7 +131,7 @@ class JavascriptNode(PipelineMixin, template.Node):
         try:
             package = self.package_for(package_name, 'js')
         except PackageNotFound:
-            logger.warn("Package %r is unknown. Check PIPELINE_JS in your settings.", package_name)
+            logger.warn("Package %r is unknown. Check PIPELINE['JAVASCRIPT'] in your settings.", package_name)
             return ''  # fail silently, do not return anything if an invalid group is specified
         return self.render_compressed(package, package_name, 'js')