fix(mge/functional): fix one_hot irregular coding style

From GITHUB 399

    ORIGINAL_AUTHOR=Asthestarsfalll <1186454801@qq.com>
    COPYBARA_INTEGRATE_REVIEW=https://github.com/MegEngine/MegEngine/pull/399 from Asthestarsfalll:master 541bf3af29
    GITHUB_PUBLIC_PR_NUMBER=399
    GITHUB_PR_URL=https://github.com/MegEngine/MegEngine/pull/399

GitOrigin-RevId: 5df007207a

imperative/python/megengine/functional/nn.py

@@ -1587,8 +1587,10 @@ def one_hot(inp: Tensor, num_classes: int) -> Tensor:
              [0 0 1 0]
              [0 0 0 1]]
     """
-    zeros_tensor = zeros(list(inp.shape) + [num_classes], inp.dtype, inp.device)
-    ones_tensor = ones(list(inp.shape) + [1], inp.dtype, inp.device)
+    zeros_tensor = zeros(
+        list(inp.shape) + [num_classes], dtype=inp.dtype, device=inp.device
+    )
+    ones_tensor = ones(list(inp.shape) + [1], dtype=inp.dtype, device=inp.device)
 
     op = builtin.IndexingSetOneHot(axis=inp.ndim)
     (result,) = apply(op, zeros_tensor, inp, ones_tensor)