ultralytics/assets update master to main (#10663)

classify/tutorial.ipynb

@@ -9,7 +9,7 @@
         "<div align=\"center\">\n",
         "\n",
         "  <a href=\"https://ultralytics.com/yolov5\" target=\"_blank\">\n",
-        "    <img width=\"1024\", src=\"https://raw.githubusercontent.com/ultralytics/assets/master/yolov5/v70/splash.png\"></a>\n",
+        "    <img width=\"1024\", src=\"https://raw.githubusercontent.com/ultralytics/assets/main/yolov5/v70/splash.png\"></a>\n",
         "\n",
         "\n",
         "<br>\n",
@@ -1222,7 +1222,7 @@
       "source": [
         "# 3. Train\n",
         "\n",
-        "<p align=\"\"><a href=\"https://roboflow.com/?ref=ultralytics\"><img width=\"1000\" src=\"https://github.com/ultralytics/assets/raw/master/im/integrations-loop.png\"/></a></p>\n",
+        "<p align=\"\"><a href=\"https://roboflow.com/?ref=ultralytics\"><img width=\"1000\" src=\"https://github.com/ultralytics/assets/raw/main/im/integrations-loop.png\"/></a></p>\n",
         "Close the active learning loop by sampling images from your inference conditions with the `roboflow` pip package\n",
         "<br><br>\n",
         "\n",