[OpenMP][OMPT] Fixes current_address printing on RV64GC (#223681)

A previous commit increased the number of arguments passed to printf in
print_possible_return_addresses(addr) but forgot to change the format in
order to include the new argument.

Fixes: 4e19543b1a85 (FIX some OMPT tests that fail on RISC-V (#156914),
2026-07-24)
GitOrigin-RevId: 0a8eb54dd990f8d9649f01aee1d2c0cbff3b68ac