Add content to Machine Learning (#9054)

* chore: sync content to repo

* Update src/data/roadmaps/machine-learning/introduction@MEL6y3vwiqwAV6FQihF34.md

* Update src/data/roadmaps/machine-learning/what-is-an-ml-engineer@FgzPlLUfGdlZPvPku0-Xl.md

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Co-authored-by: kamranahmedse <4921183+kamranahmedse@users.noreply.github.com>
Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

src/data/roadmaps/machine-learning/introduction@MEL6y3vwiqwAV6FQihF34.md

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+# Introduction to Machine Learning
+
+Machine learning is about creating computer programs that can learn from data. Instead of being explicitly programmed to perform a task, these programs improve their performance on a specific task as they are exposed to more data. This learning process allows them to make predictions or decisions without being directly told how to do so.

src/data/roadmaps/machine-learning/what-is-an-ml-engineer@FgzPlLUfGdlZPvPku0-Xl.md

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+# ML Engineer
+
+An ML Engineer focuses on building, deploying, and maintaining machine learning systems in production. They bridge the gap between data science and software engineering, taking models developed by data scientists and making them scalable, reliable, and efficient for real-world applications. This involves tasks like data pipeline construction, model deployment, performance monitoring, and infrastructure management.