Typo in meta_store_test.rb test description [ci skip] (#23)

test/meta_store_test.rb

@@ -140,7 +140,7 @@ def self.call(request); request.path_info.reverse end
         # io is closed, so that file descriptors are released
         assert io.closed?
 
-        # renderd body is the same content as the cache
+        # rendered body is the same content as the cache
         @response.body.to_a.must_equal ["TEST"]
       end