Create README.si.md

[KavinduDr]

This pull request includes a new translation for the README file in the 1-Introduction directory. The translation is in Sinhala and covers the introduction to machine learning.

Key changes:

• Added a new section titled "Machine Learning හැඳින්වීම" that introduces the foundational concepts, history, and technologies used in the field of Machine Learning.
• Included a list of lessons covering various aspects of machine learning, such as its introduction, history, fairness, and technologies.
• Added acknowledgments for contributors who authored different parts of the Machine Learning curriculum.
• Included an image with appropriate credits to enhance the document's visual appeal.

[KavinduDr]

@microsoft-github-policy-service agree