Can you think of any bug from that last five months that you could talk about for five minutes in a way that makes you look smart for solving it? That's all you need to do here.
No, my mind goes completely blank. There's nothing wrong with my memory - I can tell you how I patched the timed Grand Theft Auto 1 demo over 25 years ago with SoftICE as a kid, but I assume my brain finds no value in tracking bugs.
You don’t even need a bug where you look smart for solving it. Eg, as an interviewer I also love stories that go like this:
“There was this memory leak in some C++ code that took us weeks to track down that I’m still kicking myself for not finding earlier. It was totally my fault. Let me tell you what happened … … So the moral of the story is -fsanitize=address is smarter than me. But wow did I learn a lot about my tools from that.”