repair: Update function name in docs/row_level_repair.md
repair: Update function name in docs/row_level_repair.md

The repair rpc request_* functions are renamed to get_*.
The send_row_diff is renamed to put_row_diff.

avikivity/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla