Added Ridge Regression To Machine Learning #12108

[Akshat-Raii]

Describe your change:

• [x] Add an algorithm (Ridge Regression with L2 Regularization for predicting ADR based on player ratings).

Checklist:

• [x] I have read CONTRIBUTING.md.
• [x] This pull request is all my own work -- I have not plagiarized.
• [x] I know that pull requests will not be merged if they fail the automated tests.
• [x] This PR only changes one algorithm file. To ease review, I have kept the changes within a single implementation.
• [x] All new Python files are placed inside an existing directory.
• [x] All filenames are in all lowercase characters with no spaces or dashes.
• [x] All functions and variable names follow Python naming conventions.
• [x] All function parameters and return values are annotated with Python type hints.
• [x] All functions have doctests that pass the automated testing.
• [x] This algorithm includes at least one URL that points to Wikipedia for explanation of Ridge Regression.