[Bug Report] The vowpal wabbit container `sagemaker-rl-vw-container:vw-8.7.0-cpu` is no longer available

**Link to the notebook**

https://github.com/aws/amazon-sagemaker-examples/blob/main/reinforcement_learning/bandits_statlog_vw_customEnv/bandits_statlog_vw_customEnv.ipynb

**Describe the bug**

The vowpal wabbit container `462105765813.dkr.ecr.{AWS_REGION}.amazonaws.com/sagemaker-rl-vw-container:vw-8.7.0-cpu` used in this notebook is no longer publicly available or has been removed. Running the notebook without making changes to the reference in the [config.yaml](https://github.com/aws/amazon-sagemaker-examples/blob/main/reinforcement_learning/bandits_statlog_vw_customEnv/config.yaml) will result in the error

```
"name": "CalledProcessError",
"message": "Command '['docker', 'pull', '462105765813.dkr.ecr.us-west-2.amazonaws.com/sagemaker-rl-vw-container:vw-8.7.0-cpu']' returned non-zero exit status 1."
```
Suggesting that docker was unable to pull the image from the ECR repository.

**To reproduce**

Run the referenced notebook in local mode.

**Logs**
If applicable, add logs to help explain your problem.
You may also attach an `.ipynb` file to this issue if it includes relevant logs or output.

Start with reinforcement_learning/bandits_statlog_vw_customEnv/config.yaml and the linked bandits_statlog_vw_customEnv.ipynb, then run the notebook in local mode to reproduce the failed Docker pull. Identify an available replacement for the unavailable Vowpal Wabbit image, update the referenced configuration, and verify that the notebook runs successfully.

Written by the indexing model from the issue text.