Adding Benchmaxxer Repellant to the Open ASR Leaderboard

Appen Inc. and DataoceanAI have provided private English ASR datasets to Hugging Face's Open ASR Leaderboard to prevent benchmark-specific optimization. The datasets cover scripted and conversational speech across multiple accents. The leaderboard's Average WER remains computed on public datasets only, with an optional toggle to include private data. Contributors Eric Bezzam, Steven Zheng, and others led the effort to improve benchmark trustworthiness against test-set contamination.