fix typo in .data segment copying logic

Author: john-tornblom

document/en/ps5/exploit.js

@@ -1419,7 +1419,7 @@ async function userland() {
                     let dest = mapping_addr.add32(program_vaddr);
                     for (let j = 0; j < program_memsz; j += 0x8) {
                         let src_qword = p.read8(elf_store.add32(program_offset + j));
-                        p.write8(dest, src_qword);
+                        p.write8(dest.add32(j), src_qword);
                     }
                 }
             }