chore(deps): update dependency vanilla-framework to v4.20.3 (#1077)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [vanilla-framework](https://vanillaframework.io/)
([source](https://redirect.github.com/canonical/vanilla-framework)) |
[`4.20.2` ->
`4.20.3`](https://renovatebot.com/diffs/npm/vanilla-framework/4.20.2/4.20.3)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/vanilla-framework/4.20.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/vanilla-framework/4.20.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/vanilla-framework/4.20.2/4.20.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/vanilla-framework/4.20.2/4.20.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>canonical/vanilla-framework (vanilla-framework)</summary>

###
[`v4.20.3`](https://redirect.github.com/canonical/vanilla-framework/releases/tag/v4.20.3)

[Compare
Source](https://redirect.github.com/canonical/vanilla-framework/compare/v4.20.2...v4.20.3)

#### Getting Vanilla Framework

Install with NPM: https://www.npmjs.com/package/vanilla-framework
Visit the documentation at https://vanillaframework.io/docs

#### New in Vanilla v4.20.3

#### 🐛 Bug Fixes

- Fix wrapping items in right side of navigation by
[@&#8203;bartaz](https://redirect.github.com/bartaz)
([#&#8203;5461](https://redirect.github.com/canonical/vanilla-framework/issues/5461))

**Full Changelog**:
canonical/vanilla-framework@v4.20.2...v4.20.3

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/canonical/lxd-ui).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4xMjUuMSIsInVwZGF0ZWRJblZlciI6IjM5LjEyNS4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

package.json

@@ -44,7 +44,7 @@
     "react-router-dom": "7.1.1",
     "react-useportal": "1.0.19",
     "serve": "14.2.4",
-    "vanilla-framework": "4.20.2",
+    "vanilla-framework": "4.20.3",
     "xterm": "5.3.0",
     "xterm-addon-fit": "0.8.0",
     "yup": "1.6.1"

yarn.lock

@@ -6407,10 +6407,10 @@ [email protected]:
     "@types/istanbul-lib-coverage" "^2.0.1"
     convert-source-map "^2.0.0"
 
-[email protected].2:
-  version "4.20.2"
-  resolved "https://registry.yarnpkg.com/vanilla-framework/-/vanilla-framework-4.20.2.tgz#081266ec4d2cb5c3c63bff32e244c336219cefe6"
-  integrity sha512-TOVhZhKqEClaojd7+sWC+iIue+RtWpPi2RHnn8F1EDyoVcgnjNw2/eNJg4WdfH3gvCbjK4SWDP+iSPPY+iw+lg==
+[email protected].3:
+  version "4.20.3"
+  resolved "https://registry.yarnpkg.com/vanilla-framework/-/vanilla-framework-4.20.3.tgz#a306e80f32f5c6b6f107c02e64cc642c6eb32148"
+  integrity sha512-8nE8BxHRckdjo8VYW0jVLK9JMz1XAoTZcKGweg0jM8cV+/D313pPyomEeODAD1qq66yf/W0RfHTXv/wp0AaYfQ==
 
 vary@~1.1.2:
   version "1.1.2"