build(deps): bump @storybook/vue in /website/client (#12996)

Bumps [@storybook/vue](https://github.com/storybookjs/storybook/tree/HEAD/app/vue) from 5.3.19 to 6.1.15.
- [Release notes](https://github.com/storybookjs/storybook/releases)
- [Changelog](https://github.com/storybookjs/storybook/blob/next/CHANGELOG.md)
- [Commits](https://github.com/storybookjs/storybook/commits/v6.1.15/app/vue)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

website/client/package.json

@@ -17,7 +17,7 @@
     "@storybook/addon-knobs": "^6.1.15",
     "@storybook/addon-links": "^6.1.15",
     "@storybook/addon-notes": "^5.3.21",
-    "@storybook/vue": "^5.3.19",
+    "@storybook/vue": "^6.1.15",
     "@vue/cli-plugin-babel": "^4.5.11",
     "@vue/cli-plugin-eslint": "^4.5.11",
     "@vue/cli-plugin-router": "^4.5.11",