Documentation build fails: emodb v1.1.1 no longer available #133

The `Documentation` workflow has been failing for a while (confirmed pre-existing, at least since 2025-10-27) with:

```
RuntimeError: Cannot find version '1.1.1' for database 'emodb'.
```

when building `docs/usage.rst`. `emodb` v1.1.1 is hardcoded in the docs but has apparently been pruned from the audb-hosted database repository.

Unrelated to the CI-action-version bumps in #132 (see this comment thread for context) -- filing separately per Hagen's suggestion there.

Fix: bump the pinned `emodb` version referenced in the docs to one that's still available.