Write changelog for 9.0.0-rc.6 [skip ci]

Author: storybook-bot

CHANGELOG.prerelease.md

@@ -1,3 +1,8 @@
+## 9.0.0-rc.6
+
+- Core: Make sure to only mutate writable arrays - [#31578](https://github.com/storybookjs/storybook/pull/31578), thanks @kasperpeulen!
+- Manager: Add reactivity to useParameter - [#31579](https://github.com/storybookjs/storybook/pull/31579), thanks @valentinpalkovic!
+
 ## 9.0.0-rc.5
 
 - Addon A11y: Improve selector automigration detection - [#31392](https://github.com/storybookjs/storybook/pull/31392), thanks @yannbf!

code/package.json

@@ -283,5 +283,6 @@
         "Dependency Upgrades"
       ]
     ]
-  }
+  },
+  "deferredNextVersion": "9.0.0-rc.6"
 }

docs/versions/next.json

@@ -1 +1 @@
-{"version":"9.0.0-rc.5","info":{"plain":"- Addon A11y: Improve selector automigration detection - [#31392](https://github.com/storybookjs/storybook/pull/31392), thanks @yannbf!\n- Addon Vitest: Support `vitest.projects.ts` file as workspace file during postinstall - [#31565](https://github.com/storybookjs/storybook/pull/31565), thanks @ghengeveld!\n- Addon-Vitest: Always clean coverage before (re)running - [#31540](https://github.com/storybookjs/storybook/pull/31540), thanks @JReinhold!\n- Automigration: Fix wrap require wrapper - [#31569](https://github.com/storybookjs/storybook/pull/31569), thanks @valentinpalkovic!\n- Controls: Remove empty state video link - [#31539](https://github.com/storybookjs/storybook/pull/31539), thanks @kylegach!\n- Presets: Use `.js` files when `.cjs` files are passed for entries that should be ESM - [#31556](https://github.com/storybookjs/storybook/pull/31556), thanks @JReinhold!\n- Pseudo States: Ignore escaped pseudo-class names - [#31515](https://github.com/storybookjs/storybook/pull/31515), thanks @sentience!"}}
+{"version":"9.0.0-rc.6","info":{"plain":"- Core: Make sure to only mutate writable arrays - [#31578](https://github.com/storybookjs/storybook/pull/31578), thanks @kasperpeulen!\n- Manager: Add reactivity to useParameter - [#31579](https://github.com/storybookjs/storybook/pull/31579), thanks @valentinpalkovic!"}}