chore(deps): update packages/subiquity_client/subiquity digest to 3aead49 (#1287)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[packages/subiquity_client/subiquity](https://redirect.github.com/canonical/subiquity.git)
([changelog](https://redirect.github.com/canonical/subiquity.git/compare/afa0830e207200def42d2d7baab8695a66c926d3..3aead49e88e1fb859db8eda90a6314a1d2519fe4))
| digest | `afa0830` → `3aead49` |

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Author: d-loose