Update Convolution.cpp

Author: trivedivivek

backends/vulkan/runtime/graph/ops/impl/Convolution.cpp

@@ -402,6 +402,7 @@ void add_conv2d_node(
     wg_size = {wg_size[0] * wg_size[1] * wg_size[2], 1, 1};
   } else if (method == Conv2dMethod::Pointwise) {
     wg_size = {wg_size[0] * wg_size[1], wg_size[2], 1};
+  }
 
   utils::uvec3 local_wg_size;
   if (method == Conv2dMethod::Pointwise) {