uprobes: Update uprobe_write_opcode() kernel-doc comment

commit 6d43743e ("Uprobe: Additional argument arch_uprobe to
uprobe_write_opcode()") added the parameter @auprobe.

Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210524041411.157027-1-hqjagain@gmail.com