Bump @storybook/theming from 7.4.1 to 7.4.3 in /generators/app/templates

Bumps [@storybook/theming](https://github.com/storybookjs/storybook/tree/HEAD/code/lib/theming) from 7.4.1 to 7.4.3.
- [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/v7.4.3/code/lib/theming)

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

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

generators/app/templates/package.json

@@ -37,7 +37,7 @@
     "@ruddell/detox-expo-helpers": "0.7.0",
     "@storybook/addons": "7.4.1",
     "@storybook/react-native": "6.5.6",
-    "@storybook/theming": "7.4.1",
+    "@storybook/theming": "7.4.3",
     "@testing-library/jest-native": "5.4.3",
     "@testing-library/react-native": "12.3.0",
     "babel-jest": "29.7.0",