download-drivers.py: strip CRLF line endings
Shebang was \`#!/usr/bin/env python3\r\` which errored with \`/usr/bin/env: python3\r: No such file or directory\`. Pure line-ending fix, no content change. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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