Add ALSTM configuration and result for csi500

[witmax]

Description

Add ALSTM configuration and result for csi500

Motivation and Context

Add ALSTM configuration and result for csi500

How Has This Been Tested?

• [x] Pass the test by running: pytest qlib/tests/test_all_pipeline.py under upper directory of qlib.
• [ ] If you are adding a new feature, test on your own test scripts.

Screenshots of Test Results (if appropriate):

1. Pipeline test:
2. Your own tests:

Types of changes

• [ ] Fix bugs
• [ ] Add new feature
• [x] Update documentation

[you-n-g]

Please merge the main branch to check if the CI error is fixed. How many times did you run the model? It looks like the variance is 0, which conflicts with the previous one.

[github-actions[bot]]

This PR is stale because it has been open for a year with no activity. Remove the stale label or comment on the PR otherwise this will be closed in 5 days