Remove unintended caret symbols

[yaxu]

Thanks for this @ben-miller, the caret symbols are intended there though. They indicate that values should come from an incoming OSC or in this case MIDI control message.

[jwaldmann]

caret symbols ... indicate ...

that's missing from the documentation? (no caret at https://tidalcycles.org/docs/reference/mini_notation#mini-notation-table)