Fix typo

Author: Josh Fromm

python/tvm/relax/frontend/nn/modules.py

@@ -343,7 +343,7 @@ def forward(self, x: Tensor) -> Tensor:  # pylint: disable=invalid-name
         Returns
         -------
         ret : Tensor
-            The output tensor for the conv2d layer.
+            The output tensor for the conv3d layer.
         """
         return op.conv3d(
             x,