Update storybook monorepo to v8

Author: renovate[bot]

Diff for: examples/kitchen-sink/package.json

@@ -23,11 +23,11 @@
   "devDependencies": {
     "@buncho/storybook-preset": "workspace:*",
     "@neetly/tsconfig": "0.3.0",
-    "@storybook/addon-essentials": "7.6.17",
-    "@storybook/react": "7.6.17",
-    "@storybook/react-webpack5": "7.6.17",
+    "@storybook/addon-essentials": "8.6.12",
+    "@storybook/react": "8.6.12",
+    "@storybook/react-webpack5": "8.6.12",
     "buncho": "workspace:*",
-    "storybook": "7.6.17",
+    "storybook": "8.6.12",
     "typescript": "5.4.4"
   }
 }