minor edits to index.rst
minor edits to index.rst

ccxt/ccxt,aiueogawa/ccxt,aiueogawa/ccxt,ccxt/ccxt,tritoanst/ccxt,tritoanst/ccxt,ccxt/ccxt,tritoanst/ccxt,aiueogawa/ccxt,tritoanst/ccxt,aiueogawa/ccxt,ccxt/ccxt,ccxt/ccxt