Update dependency @vue/eslint-config-prettier to v9 (#226)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@vue/eslint-config-prettier](https://github.com/vuejs/eslint-config-prettier) | devDependencies | major | [`^7.1.0` -> `^9.0.0`](https://renovatebot.com/diffs/npm/@vue%2feslint-config-prettier/7.1.0/9.0.0) |

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### Release Notes

<details>
<summary>vuejs/eslint-config-prettier (@&#8203;vue/eslint-config-prettier)</summary>

### [`v9.0.0`](https://github.com/vuejs/eslint-config-prettier/releases/tag/v9.0.0)

[Compare Source](vuejs/eslint-config-prettier@v8.0.0...v9.0.0)

#### Breaking Changes

-   Update eslint-config-prettier to v9 by [@&#8203;WikiRik](https://github.com/WikiRik) in vuejs/eslint-config-prettier#18, which contains the following potential breaking change:
    > Changed: [unicode-bom](https://eslint.org/docs/rules/unicode-bom) is no longer turned off. Prettier preserves the BOM if you have one, and does not add one if missing. It was wrong of eslint-config-prettier to disable that rule. If you get ESLint errors after upgrading, either add "unicode-bom": "off" to your config to disable it again, or run ESLint with --fix to fix all files according to the rule (add or remove BOM). Thanks to Nicolas Stepien ([@&#8203;nstepien](https://github.com/nstepien))!

### [`v8.0.0`](https://github.com/vuejs/eslint-config-prettier/blob/HEAD/CHANGELOG.md#800-2023-07-20)

[Compare Source](vuejs/eslint-config-prettier@v7.1.0...v8.0.0)

##### Breaking Changes

-   Upgraded to Prettier v3; please check out the [Prettier release blog](https://prettier.io/blog/2023/07/05/3.0.0.html) for more details
-   Requires Node.js >= v14
-   Requires ESLint >= v8

</details>

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Reviewed-on: https://git.zzdats.lv/lx/demo/pulls/226
Reviewed-by: Niklāvs Mežeckis <niklavs.mezeckis@zzdats.lv>
Reviewed-by: Daniils Seliverstovs <daniils.seliverstovs@zzdats.lv>
Co-authored-by: Renovate Bot <renovate@zzdats.lv>
Co-committed-by: Renovate Bot <renovate@zzdats.lv>

package.json

@@ -25,7 +25,7 @@
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^5.0.0",
-    "@vue/eslint-config-prettier": "^7.1.0",
+    "@vue/eslint-config-prettier": "^9.0.0",
     "@vue/test-utils": "^2.4.4",
     "eslint": "^8.40.0",
     "eslint-config-airbnb-base": "^15.0.0",