QED symbol too close to end of proof text when paragraphs are justified

For example:

```
#import "@preview/theorion:0.6.0": *
#import cosmos.simple: *
#show: show-theorion

#set par(justify: true)

#proof[Lorem ipsum dolor sit amet, consectetur adipiscing elit. In tristique dui sit amet euismod fauci.]
```

<img width="830" height="33" alt="Image" src="https://github.com/user-attachments/assets/1857c902-0d6d-41cf-8520-e87019286fcd" />