[Doc] Update link of preload TFX sample (kubeflow#2839)

* update link

* update tag in link and move

backend/src/apiserver/config/sample_config.json

@@ -1,32 +1,32 @@
 [
   {
     "name": "[Sample] ML - XGBoost - Training with Confusion Matrix",
-    "description": "[GCP Permission requirements](https://github.com/kubeflow/pipelines/tree/1b04983d96d097a12245a2d79469d3c51af5c7f4/samples/core/xgboost_training_cm#requirements). A trainer that does end-to-end distributed training for XGBoost models. [source code](https://github.com/kubeflow/pipelines/tree/1b04983d96d097a12245a2d79469d3c51af5c7f4/samples/core/xgboost_training_cm)",
+    "description": "[GCP Permission requirements](https://github.com/kubeflow/pipelines/tree/1b04983d96d097a12245a2d79469d3c51af5c7f4/samples/core/xgboost_training_cm#requirements). [source code](https://github.com/kubeflow/pipelines/tree/0.1.40/samples/core/xgboost_training_cm). A trainer that does end-to-end distributed training for XGBoost models.",
     "file": "/samples/core/xgboost_training_cm/xgboost_training_cm.py.yaml"
   },
   {
     "name": "[Sample] Unified DSL - Taxi Tip Prediction Model Trainer",
-    "description": "[GCP Permission requirements](https://github.com/kubeflow/pipelines/blob/1b04983d96d097a12245a2d79469d3c51af5c7f4/samples/contrib/parameterized_tfx_oss#permission). Example pipeline that does classification with model analysis based on a public tax cab BigQuery dataset. [source code](https://github.com/kubeflow/pipelines/tree/1b04983d96d097a12245a2d79469d3c51af5c7f4/samples/contrib/parameterized_tfx_oss)",
+    "description": "[GCP Permission requirements](https://github.com/kubeflow/pipelines/blob/1b04983d96d097a12245a2d79469d3c51af5c7f4/samples/contrib/parameterized_tfx_oss#permission). [source code](https://console.cloud.google.com/mlengine/notebooks/deploy-notebook?q=download_url%3Dhttps%253A%252F%252Fraw.githubusercontent.com%252Fkubeflow%252Fpipelines%252F0.1.40%252Fsamples%252Fcore%252Fparameterized_tfx_oss%252Ftaxi_pipeline_notebook.ipynb). Example pipeline that does classification with model analysis based on a public tax cab BigQuery dataset.",
     "file": "/samples/core/parameterized_tfx_oss/parameterized_tfx_oss.py.yaml"
   },
   {
     "name": "[Sample] Basic - Sequential execution",
-    "description": "A pipeline with two sequential steps. [source code](https://github.com/kubeflow/pipelines/blob/1b04983d96d097a12245a2d79469d3c51af5c7f4/samples/core/sequential/sequential.py)",
+    "description": "[source code](https://github.com/kubeflow/pipelines/blob/0.1.40/samples/core/sequential/sequential.py) A pipeline with two sequential steps.",
     "file": "/samples/core/sequential/sequential.py.yaml"
   },
   {
     "name": "[Sample] Basic - Parallel execution",
-    "description": "A pipeline that downloads two messages in parallel and prints the concatenated result. [source code](https://github.com/kubeflow/pipelines/blob/1b04983d96d097a12245a2d79469d3c51af5c7f4/samples/core/parallel_join/parallel_join.py)",
+    "description": "[source code](https://github.com/kubeflow/pipelines/blob/0.1.40/samples/core/parallel_join/parallel_join.py) A pipeline that downloads two messages in parallel and prints the concatenated result.",
     "file": "/samples/core/parallel_join/parallel_join.py.yaml"
   },
   {
     "name": "[Sample] Basic - Conditional execution",
-    "description": "A pipeline shows how to use dsl.Condition. [source code](https://github.com/kubeflow/pipelines/blob/1b04983d96d097a12245a2d79469d3c51af5c7f4/samples/core/condition/condition.py)",
+    "description": "[source code](https://github.com/kubeflow/pipelines/blob/0.1.40/samples/core/condition/condition.py) A pipeline shows how to use dsl.Condition.",
     "file": "/samples/core/condition/condition.py.yaml"
   },
   {
     "name": "[Sample] Basic - Exit Handler",
-    "description": "A pipeline that downloads a message and prints it out. Exit Handler will run at the end. [source code](https://github.com/kubeflow/pipelines/blob/1b04983d96d097a12245a2d79469d3c51af5c7f4/samples/core/exit_handler/exit_handler.py)",
+    "description": "[source code](https://github.com/kubeflow/pipelines/blob/0.1.40/samples/core/exit_handler/exit_handler.py) A pipeline that downloads a message and prints it out. Exit Handler will run at the end.",
     "file": "/samples/core/exit_handler/exit_handler.py.yaml"
   }
 ]