Bump @pagefind/default-ui from 1.0.3 to 1.1.1 in /docs

Bumps @pagefind/default-ui from 1.0.3 to 1.1.1.

---
updated-dependencies:
- dependency-name: "@pagefind/default-ui"
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>