chore(deps-dev): bump @storybook/theming from 7.6.3 to 7.6.12

Bumps [@storybook/theming](https://github.com/storybookjs/storybook/tree/HEAD/code/lib/theming) from 7.6.3 to 7.6.12.
- [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/v7.6.12/code/lib/theming)

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

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

package.json

@@ -54,7 +54,7 @@
     "@storybook/preset-typescript": "^3.0.0",
     "@storybook/react": "^7.6.3",
     "@storybook/react-webpack5": "^7.6.3",
-    "@storybook/theming": "^7.6.3",
+    "@storybook/theming": "^7.6.12",
     "@storybook/web-components": "^7.6.3",
     "@storybook/web-components-webpack5": "^7.6.3",
     "@testing-library/jest-dom": "^6.1.4",