fix doc.

modules/dnn/src/layers/convolution_layer.cpp

@@ -676,7 +676,7 @@ public:
                                         int j0 = std::max(0, (-in_j + dilation_w-1)/dilation_w);
                                         int j1 = std::min(kernel_w, (width - in_j + dilation_w-1)/dilation_w);
 
-                                        // here some non-continous sub-row of the row will not be
+                                        // here some non-continuous sub-row of the row will not be
                                         // filled from the tensor; we need to make sure that the uncovered
                                         // elements are explicitly set to 0's. the easiest way is to
                                         // set all the elements to 0's before the loop.