fix github workflow

github_project/helper.py

@@ -0,0 +1,9 @@
+import tensorflow as tf
+
+
+def prepare_tensors(df):
+    Y = df["Price"]
+    X = df.drop("Price", axis=1)
+    X_tensor = tf.convert_to_tensor(X, dtype=tf.float32)
+    Y_tensor = tf.convert_to_tensor(Y, dtype=tf.float32)
+    return X_tensor, Y_tensor