Bump @storybook/addon-docs from 6.4.9 to 6.4.12

Bumps [@storybook/addon-docs](https://github.com/storybookjs/storybook/tree/HEAD/addons/docs) from 6.4.9 to 6.4.12.
- [Release notes](https://github.com/storybookjs/storybook/releases)
- [Changelog](https://github.com/storybookjs/storybook/blob/v6.4.12/CHANGELOG.md)
- [Commits](https://github.com/storybookjs/storybook/commits/v6.4.12/addons/docs)

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

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

package.json

@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "@storybook/addon-controls": "^6.4.12",
-    "@storybook/addon-docs": "^6.4.9",
+    "@storybook/addon-docs": "^6.4.12",
     "@storybook/server": "^6.4.12",
     "jasmine-core": "~2.4.1",
     "jest": "^27.4.7",