fix: Fix import error string showing wrong pip install path (#1076)

Fix import error showing `python-aiplatform` instead of `google-cloud-aiplatform`.

Author: taiseiak

google/cloud/aiplatform/explain/lit.py

@@ -29,23 +29,23 @@
 except ImportError:
  raise ImportError(
  "LIT is not installed and is required to get Dataset as the return format. "
- 'Please install the SDK using "pip install python-aiplatform[lit]"'
+ 'Please install the SDK using "pip install google-cloud-aiplatform[lit]"'
  )
 
 try:
  import tensorflow as tf
 except ImportError:
  raise ImportError(
  "Tensorflow is not installed and is required to load saved model. "
- 'Please install the SDK using "pip install pip install python-aiplatform[lit]"'
+ 'Please install the SDK using "pip install google-cloud-aiplatform[lit]"'
  )
 
 try:
  import pandas as pd
 except ImportError:
  raise ImportError(
  "Pandas is not installed and is required to read the dataset. "
- 'Please install Pandas using "pip install python-aiplatform[lit]"'
+ 'Please install Pandas using "pip install google-cloud-aiplatform[lit]"'
  )