chore(deps-dev): Bump storybook from 7.5.3 to 7.6.21 (#2883)

Bumps [storybook](https://github.com/storybookjs/storybook/tree/HEAD/code/core) from 7.5.3 to 7.6.21.
- [Release notes](https://github.com/storybookjs/storybook/releases)
- [Changelog](https://github.com/storybookjs/storybook/blob/next/CHANGELOG.v1-5.md)
- [Commits](https://github.com/storybookjs/storybook/commits/v7.6.21/code/core)

---
updated-dependencies:
- dependency-name: storybook
  dependency-version: 7.6.21
  dependency-type: direct:development
...

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Author: dependabot[bot]

package.json

@@ -57,7 +57,7 @@
     "react": "16.14.0",
     "react-dom": "16.14.0",
     "start-server-and-test": "^2.0.0",
-    "storybook": "7.5.3",
+    "storybook": "7.6.21",
     "style-loader": "^3.3.3",
     "ts-jest": "^26.5.6",
     "tsconfig-paths-webpack-plugin": "^3.2.0",