cli: Silence -Wformat warnings

[orbea]

With GCC-13.1.1 and clang-16.0.4.

cli/cli.cpp:475:51: warning: format specifies type 'long long' but the argument has type 'int64_t' (aka 'long') [-Wformat]
                        sprintf(temp, "%lld -> %lld bytes (%.0f%%)\n", total, written, ratio);
                                       ~~~~                            ^~~~~
                                       %ld
cli/cli.cpp:475:58: warning: format specifies type 'long long' but the argument has type 'int64_t' (aka 'long') [-Wformat]
                        sprintf(temp, "%lld -> %lld bytes (%.0f%%)\n", total, written, ratio);
                                               ~~~~                           ^~~~~~~
                                               %ld

[unknownbrackets]

Fair, I probably would've cast to long long, I find the PRId64 things ugly. If long long ever does become longer than 64 bits, it would presumably be on a platform where registers and sprintf() arguments are promoted to that alignment and size anyway. Oh well.

Thanks for the warning fix.

-[Unknown]