chore(deps-dev): bump storybook from 8.3.5 to 8.4.0

Bumps [storybook](https://github.com/storybookjs/storybook/tree/HEAD/code/lib/cli) from 8.3.5 to 8.4.0.
- [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/v8.4.0/code/lib/cli)

---
updated-dependencies:
- dependency-name: storybook
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@ably/ui",
-  "version": "14.7.7",
+  "version": "14.7.8",
   "description": "Home of the Ably design system library ([design.ably.com](https://design.ably.com)). It provides a showcase, development/test environment and a publishing pipeline for different distributables.",
   "repository": {
     "type": "git",
@@ -16,13 +16,13 @@
   ],
   "types": "index.d.ts",
   "devDependencies": {
-    "@storybook/addon-a11y": "^8.3.5",
-    "@storybook/addon-essentials": "^8.3.5",
-    "@storybook/addon-interactions": "^8.3.5",
-    "@storybook/addon-links": "^8.3.5",
-    "@storybook/blocks": "^8.3.5",
-    "@storybook/react-vite": "^8.3.5",
-    "@storybook/test": "^8.3.5",
+    "@storybook/addon-a11y": "^8.4.0",
+    "@storybook/addon-essentials": "^8.4.0",
+    "@storybook/addon-interactions": "^8.4.0",
+    "@storybook/addon-links": "^8.4.0",
+    "@storybook/blocks": "^8.4.0",
+    "@storybook/react-vite": "^8.4.0",
+    "@storybook/test": "^8.4.0",
     "@storybook/test-runner": "^0.19.1",
     "@swc/cli": "^0.5.0",
     "@swc/core": "^1.4.11",
@@ -44,7 +44,7 @@
     "msw": "2.6.0",
     "msw-storybook-addon": "^2.0.2",
     "prettier": "^3.2.5",
-    "storybook": "^8.3.5",
+    "storybook": "^8.4.0",
     "storybook-dark-mode": "^4.0.2",
     "svg-sprite": "^2.0.4",
     "tailwindcss": "^3.3.6",