fix: use new tensorflow kaggle kernel slug

Author: mylastresort

Makefile

@@ -23,4 +23,4 @@ pull-kernels:
 	kaggle kernels pull mylastresort/churn-naive-classifier -p .
 	kaggle kernels pull mylastresort/churn-numpy -p .
 	kaggle kernels pull mylastresort/churn-random-forest -p .
-	kaggle kernels pull mylastresort/churn-tensorflow -p .
+	kaggle kernels pull mylastresort/churn-tensorflow-v2 -p .

churn_tensorflow.kernel-metadata.json

@@ -1,6 +1,6 @@
 {
-  "id": "mylastresort/churn-tensorflow",
-  "title": "Churn Tensorflow",
+  "id": "mylastresort/churn-tensorflow-v2",
+  "title": "Churn Tensorflow V2",
   "code_file": "notebooks/05_tensorflow.ipynb",
   "language": "python",
   "kernel_type": "notebook",