chore(model gallery): add lb-reranker-0.5b-v1.0

[mudler]

Description

This pull request includes an update to the gallery/index.yaml file to add a new model entry. The new model, lb-reranker-0.5b-v1.0, is a reranker trained to determine the relatedness of a query to a piece of text, supporting various retrieval-based tasks.

Key changes:

• Added a new model entry lb-reranker-0.5b-v1.0 with detailed description and benefits.
  • Included URLs for the model on Hugging Face.
  • Provided information about the training process, data, and code repository.
  • Highlighted the model's multilingual training and performance benefits.
  • Mentioned the model's compatibility with various inference packages.
  • Added an update about the model's effectiveness as a code snippet reranker.

Notes for Reviewers

Signed commits

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