Fix ONNX URLs (#252)

Author: apivovarov

docs/dev/benchmark.rst

@@ -104,7 +104,7 @@ Here is sample data encoded as JSON:
     },
     "workload_metadata":{
       "class":"vision",
-      "doc_url":"https://github.com/onnx/models/blob/master/vision/body_analysis/arcface/README.md",
+      "doc_url":"https://github.com/onnx/models/blob/main/vision/body_analysis/arcface/README.md",
       "md5":"66074b860f905295aab5a842be57f37d",
       "opset":8,
       "type":"body_analysis",

python/tvm/relay/frontend/onnx.py

@@ -1518,7 +1518,7 @@ class LRN(OnnxOpConverter):
     @classmethod
     def _impl_v1(cls, inputs, attr, params):
         """LRN support only NCHW format
-        https://github.com/onnx/onnx/blob/master/docs/Operators.md#LRN
+        https://github.com/onnx/onnx/blob/main/docs/Operators.md#LRN
         """
         axis = 1
         alpha = attr.get("alpha", 0.0001)
@@ -1949,7 +1949,7 @@ def _impl_v8(cls, inputs, attr, params):
         # However, ONNX Expand supports multi-directional broadcasting, which allows
         # above pattern and also some extent of 'shape' can be smaller than the corresponding
         # extent of 'input'. In this case, the extent of 'shape' must be 1.
-        # https://github.com/onnx/onnx/blob/master/docs/Broadcasting.md
+        # https://github.com/onnx/onnx/blob/main/docs/Broadcasting.md
         # In above cases, we cannot directorly apply 'op.broadcast_to' instead of 'expand'
         # so, here we solved this problem by expanding the given 'shape' itself.
         def expand_shape(in_shape, shape):
@@ -3219,7 +3219,7 @@ def _get_convert_map(opset):
 
 class GraphProto:
     """A helper class for handling Relay expression copying from pb2.GraphProto.
-    Definition: https://github.com/onnx/onnx/blob/master/onnx/onnx.proto
+    Definition: https://github.com/onnx/onnx/blob/main/onnx/onnx.proto
 
         Parameters
     ----------

tests/python/contrib/test_bnns/test_onnx_topologies.py

@@ -34,7 +34,7 @@
 TARGET = "llvm"
 INPUT_SHAPE = [1, 3, 224, 224]
 
-BASE_MODEL_URL = "https://github.com/onnx/models/raw/master/"
+BASE_MODEL_URL = "https://github.com/onnx/models/raw/main/"
 MODEL_URL_COLLECTION = {
     "BERT": "text/machine_comprehension/bert-squad/model/bertsquad-10.onnx",
     "MobileNet-v2": "vision/classification/mobilenet/model/mobilenetv2-7.onnx",

tests/python/driver/tvmc/conftest.py

@@ -147,7 +147,7 @@ def pytorch_resnet18(tmpdir_factory):
 
 @pytest.fixture(scope="session")
 def onnx_resnet50():
-    base_url = "https://github.com/onnx/models/raw/master/vision/classification/resnet/model"
+    base_url = "https://github.com/onnx/models/raw/main/vision/classification/resnet/model"
     file_to_download = "resnet50-v2-7.onnx"
     model_file = download_testdata(
         "{}/{}".format(base_url, file_to_download), file_to_download, module=["tvmc"]
@@ -158,7 +158,7 @@ def onnx_resnet50():
 
 @pytest.fixture(scope="session")
 def onnx_mnist():
-    base_url = "https://github.com/onnx/models/raw/master/vision/classification/mnist/model"
+    base_url = "https://github.com/onnx/models/raw/main/vision/classification/mnist/model"
     file_to_download = "mnist-1.onnx"
     model_file = download_testdata(
         "{}/{}".format(base_url, file_to_download), file_to_download, module=["tvmc"]

tutorials/get_started/tvmc_command_line_driver.py

@@ -87,7 +87,7 @@
 #
 # .. code-block:: bash
 #
-#   wget https://github.com/onnx/models/raw/master/vision/classification/resnet/model/resnet50-v2-7.onnx
+#   wget https://github.com/onnx/models/raw/main/vision/classification/resnet/model/resnet50-v2-7.onnx
 #