Txtai 5.1: better machine translation, Whisper transcription and ARM support

txtai executes machine-learning workflows to transform data and build AI-powered semantic search applications.

5.1 adds new model support for the translation pipeline, OpenAI Whisper support in the transcription pipeline and ARM Docker images. Topic modeling was also updated with improvements, including how to use BM25/TF-IDF indexes to drive topic models.

Release notes: https://github.com/neuml/txtai/releases/tag/v5.1.0