Mac: "ShipIt" using 99% CPU

### Steps to reproduce

I've only seen this happen once, so I'm not sure how much help it'll be, but I figured I should report it anyway.

My Intel iMac is usually quiet, but the fans had been running at a low speed for an hour or so. Eventually I looked in Activity Monitor and found that "ShipIt" was using 99% CPU.

I did Inspect Process on ShipIt, and under Open Files I could see that it had some Element files open. I then quit Element, which didn't make ShipIt go away.

Next, I quit (not force quit) ShipIt via Activity Monitor. This made Element start up again. Quitting it a second time resulted in the fans spinning back down, and I've subsequently opened Element again and it's still being quiet.

### Outcome

#### What did you expect?
I don't know what ShipIt is, but I wouldn't expect it to use 99% CPU for an extended period.

[Maintainer note: ShipIt is part of [Squirrel.Mac](https://github.com/Squirrel/Squirrel.Mac), the framework we use for managing updates]

#### What happened instead?
See above.

### Operating system

macOS 12.3.1

### Application version

Element 1.10.13

### How did you install the app?

From https://element.io/get-started

### Homeserver

matrix.org

### Will you send logs?

Yes