Fixing the incorrect link in backend.py
Added the correct link for RaggedTensor
@@ -1370,7 +1370,7 @@ def placeholder(
ragged: Boolean, whether the placeholder should have a ragged type.
In this case, values of 'None' in the 'shape' argument represent
ragged dimensions. For more information about RaggedTensors, see
- this [guide](https://www.tensorflow.org/guide/ragged_tensors).
+ this [guide](https://www.tensorflow.org/guide/ragged_tensor).
Raises:
ValueError: If called with sparse = True and ragged = True.
