Update dependency ai to v4.1.20 (#28)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [ai](https://sdk.vercel.ai/docs)
([source](https://redirect.github.com/vercel/ai)) | [`4.1.16` ->
`4.1.20`](https://renovatebot.com/diffs/npm/ai/4.1.16/4.1.20) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/ai/4.1.20?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/ai/4.1.20?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/ai/4.1.16/4.1.20?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/ai/4.1.16/4.1.20?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Release Notes

<details>
<summary>vercel/ai (ai)</summary>

###
[`v4.1.20`](https://redirect.github.com/vercel/ai/releases/tag/ai%404.1.20)

[Compare
Source](https://redirect.github.com/vercel/ai/compare/[email protected]@4.1.20)

##### Patch Changes

- [`bcc61d4`](https://redirect.github.com/vercel/ai/commit/bcc61d4):
feat (ui): introduce message parts for useChat
- Updated dependencies
\[[`bcc61d4`](https://redirect.github.com/vercel/ai/commit/bcc61d4)]
-
[@&#8203;ai-sdk/ui-utils](https://redirect.github.com/ai-sdk/ui-utils)[@&#8203;1](https://redirect.github.com/1).1.10
-
[@&#8203;ai-sdk/react](https://redirect.github.com/ai-sdk/react)[@&#8203;1](https://redirect.github.com/1).1.10

###
[`v4.1.19`](https://redirect.github.com/vercel/ai/releases/tag/ai%404.1.19)

[Compare
Source](https://redirect.github.com/vercel/ai/compare/[email protected]@4.1.19)

##### Patch Changes

- Updated dependencies
\[[`6b8cc14`](https://redirect.github.com/vercel/ai/commit/6b8cc14)]
-
[@&#8203;ai-sdk/ui-utils](https://redirect.github.com/ai-sdk/ui-utils)[@&#8203;1](https://redirect.github.com/1).1.9
-
[@&#8203;ai-sdk/react](https://redirect.github.com/ai-sdk/react)[@&#8203;1](https://redirect.github.com/1).1.9

###
[`v4.1.18`](https://redirect.github.com/vercel/ai/releases/tag/ai%404.1.18)

[Compare
Source](https://redirect.github.com/vercel/ai/compare/[email protected]@4.1.18)

##### Patch Changes

- [`6a1acfe`](https://redirect.github.com/vercel/ai/commit/6a1acfe): fix
(ai/core): revert
'[@&#8203;internal](https://redirect.github.com/internal)' tag on
function definitions due to build impacts

###
[`v4.1.17`](https://redirect.github.com/vercel/ai/releases/tag/ai%404.1.17)

[Compare
Source](https://redirect.github.com/vercel/ai/compare/[email protected]@4.1.17)

##### Patch Changes

- [`5af8cdb`](https://redirect.github.com/vercel/ai/commit/5af8cdb): fix
(ai/core): support this reference in model.supportsUrl implementations

</details>

---

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---

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---

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frontend/web/package.json

@@ -26,7 +26,7 @@
     "@radix-ui/react-slot": "^1.1.1",
     "@radix-ui/react-tooltip": "^1.1.7",
     "@radix-ui/react-visually-hidden": "^1.1.1",
-    "ai": "4.1.16",
+    "ai": "4.1.20",
     "bcrypt-ts": "^5.0.3",
     "class-variance-authority": "^0.7.1",
     "classnames": "^2.5.1",