Fix links that should be internal

Author: smokestacklightnin

docs/install.md

@@ -19,7 +19,7 @@ TF Data Validation includes:
      learn more in order to correct them.
 
 For instructions on using TFDV, see the
-[get started guide](https://github.com/tensorflow/data-validation/blob/master/g3doc/get_started.md)
+[get started guide](../get_started)
 and try out the
 [example notebook](https://colab.research.google.com/github/tensorflow/tfx/blob/master/docs/tutorials/data_validation/tfdv_basic.ipynb).
 Some of the techniques implemented in TFDV are described in a
@@ -229,9 +229,9 @@ tag.
 
 ## Links
 
-*   [TensorFlow Data Validation Getting Started Guide](https://www.tensorflow.org/tfx/data_validation/get_started)
+*   [TensorFlow Data Validation Getting Started Guide](../get_started)
 *   [TensorFlow Data Validation Notebook](https://colab.research.google.com/github/tensorflow/tfx/blob/master/docs/tutorials/data_validation/tfdv_basic.ipynb)
-*   [TensorFlow Data Validation API Documentation](https://www.tensorflow.org/tfx/data_validation/api_docs/python/tfdv)
+*   [TensorFlow Data Validation API Documentation](../api)
 *   [TensorFlow Data Validation Blog Post](https://medium.com/tensorflow/introducing-tensorflow-data-validation-data-understanding-validation-and-monitoring-at-scale-d38e3952c2f0)
 *   [TensorFlow Data Validation PyPI](https://pypi.org/project/tensorflow-data-validation/)
 *   [TensorFlow Data Validation Paper](https://www.sysml.cc/doc/2019/167.pdf)