c1: added the course 1 folder into the hierarchy.

updated the colab badge links for c1 labs.

Author: e7dud7e

Diff for: Week 4 - Models/.ipynb_checkpoints/C1_W4_Lab_2_resnet-example-checkpoint.ipynb renamed to Course 1 - Custom Models, Layers and Loss Functions/Week 4 - Models/.ipynb_checkpoints/C1_W4_Lab_2_resnet-example-checkpoint.ipynb

@@ -7,7 +7,7 @@
     "id": "view-in-github"
    },
    "source": [
-    "<a href=\"https://colab.research.google.com/github/https-deeplearning-ai/tensorflow-3-public/blob/main/Week%204%20-%20Models/C1_W4_Lab_2_resnet-example.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/https-deeplearning-ai/tensorflow-3-public/blob/main/Course%201%20-%20Custom%20Models%2C%20Layers%20and%20Loss%20Functions/Week%204%20-%20Models/C1_W4_Lab_2_resnet-example.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
    ]
   },
   {

Diff for: Week 4 - Models/C1_W4_Lab_2_resnet-example.ipynb renamed to Course 1 - Custom Models, Layers and Loss Functions/Week 4 - Models/C1_W4_Lab_2_resnet-example.ipynb

@@ -7,7 +7,7 @@
     "id": "view-in-github"
    },
    "source": [
-    "<a href=\"https://colab.research.google.com/github/https-deeplearning-ai/tensorflow-3-public/blob/main/Week%205%20-%20Callbacks/C1_W5_Lab_1_exploring-callbacks.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/https-deeplearning-ai/tensorflow-3-public/blob/main/Course%201%20-%20Custom%20Models%2C%20Layers%20and%20Loss%20Functions/eek%205%20-%20Callbacks/C1_W5_Lab_1_exploring-callbacks.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
    ]
   },
   {