Bump pages/.vitepress/theme from a4d5074 to 2fd72d2

Bumps [pages/.vitepress/theme](https://github.com/GabsEdits/aplos-theme) from `a4d5074` to `2fd72d2`.
- [Commits](aplosdev/submodule@a4d5074...2fd72d2)

---
updated-dependencies:
- dependency-name: pages/.vitepress/theme
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>