Add Open in Kaggle badge (#1773)

* Update tutorial.ipynb

add Open in Kaggle badge

* Update tutorial.ipynb

Open badge in same window

* add space between badges

* add space 2

* remove align left
Co-authored-by: NGlenn Jocher <glenn.jocher@ultralytics.com>

tutorial.ipynb

@@ -517,7 +517,8 @@
         "colab_type": "text"
       },
       "source": [
-        "<a href=\"https://colab.research.google.com/github/ultralytics/yolov3/blob/master/tutorial.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+        "<a href=\"https://colab.research.google.com/github/ultralytics/yolov3/blob/master/tutorial.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>",
+        "<a href=\"https://kaggle.com/kernels/welcome?src=https://github.com/ultralytics/yolov3/blob/master/tutorial.ipynb\" target=\"_parent\"><img alt=\"Kaggle\" title=\"Open in Kaggle\" src=\"https://kaggle.com/static/images/open-in-kaggle.svg\"></a>"
       ]
     },
     {
@@ -1267,4 +1268,4 @@
       "outputs": []
     }
   ]
-}
\ No newline at end of file
+}