chore: bump @storybook/addon-a11y from 6.5.12 to 7.3.0

Bumps [@storybook/addon-a11y](https://github.com/storybookjs/storybook/tree/HEAD/code/addons/a11y) from 6.5.12 to 7.3.0.
- [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/v7.3.0/code/addons/a11y)

---
updated-dependencies:
- dependency-name: "@storybook/addon-a11y"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -48,7 +48,7 @@
     "@commitlint/config-conventional": "^17.1.0",
     "@cypress/code-coverage": "^3.10.0",
     "@onfido/castor-icons": "*",
-    "@storybook/addon-a11y": "^6.5.12",
+    "@storybook/addon-a11y": "^7.3.0",
     "@storybook/addon-controls": "^6.5.12",
     "@storybook/addon-docs": "^6.5.12",
     "@storybook/addon-google-analytics": "^6.2.9",