ruc-ai4math/mathlib_handler_benchmark_410 · Improve dataset card: update task category, add project page, and sample usage

This PR updates the dataset card for ruc-ai4math/mathlib_handler_benchmark_410 by:

Correcting the task_categories from question-answering to text-ranking to accurately reflect the dataset's purpose of premise retrieval.
Adding library_name: datasets to the metadata for better discoverability and usability within the Hugging Face ecosystem.
Including a link to the project's official page: https://premise-search.com/.
Correcting the paper title in the content to "Learning an Effective Premise Retrieval Model for Efficient Mathematical Formalization".
Providing a basic sample usage snippet for loading the dataset using the datasets library.