Write changelog for 9.1.0-alpha.6 [skip ci]

Author: storybook-bot

CHANGELOG.prerelease.md

@@ -1,3 +1,10 @@
+## 9.1.0-alpha.6
+
+- CLI: Fix package manager instantiation in empty directories - [#31743](https://github.com/storybookjs/storybook/pull/31743), thanks @yannbf!
+- CLI: Improve support for upgrading Storybook in monorepos - [#31557](https://github.com/storybookjs/storybook/pull/31557), thanks @yannbf!
+- CSF: Improve docs parameter types - [#31736](https://github.com/storybookjs/storybook/pull/31736), thanks @kasperpeulen!
+- Core: Delete shim addon packages - [#31728](https://github.com/storybookjs/storybook/pull/31728), thanks @ndelangen!
+
 ## 9.1.0-alpha.5
 
 - Addon Themes: Define missing React dependencies - [#31688](https://github.com/storybookjs/storybook/pull/31688), thanks @ghengeveld!

code/package.json

@@ -283,5 +283,6 @@
         "Dependency Upgrades"
       ]
     ]
-  }
+  },
+  "deferredNextVersion": "9.1.0-alpha.6"
 }

docs/versions/next.json

@@ -1 +1 @@
-{"version":"9.1.0-alpha.5","info":{"plain":"- Addon Themes: Define missing React dependencies - [#31688](https://github.com/storybookjs/storybook/pull/31688), thanks @ghengeveld!\n- Addon-vitest: Fix adding with `--skip-install` failing missing packageJson invariant - [#31720](https://github.com/storybookjs/storybook/pull/31720), thanks @JReinhold!\n- AddonDocs: Remove export of blocks - [#31724](https://github.com/storybookjs/storybook/pull/31724), thanks @ndelangen!\n- CSF: Only add preview annotations to definePreview in csf-factories automigration - [#31727](https://github.com/storybookjs/storybook/pull/31727), thanks @kasperpeulen!"}}
+{"version":"9.1.0-alpha.6","info":{"plain":"- CLI: Fix package manager instantiation in empty directories - [#31743](https://github.com/storybookjs/storybook/pull/31743), thanks @yannbf!\n- CLI: Improve support for upgrading Storybook in monorepos - [#31557](https://github.com/storybookjs/storybook/pull/31557), thanks @yannbf!\n- CSF: Improve docs parameter types - [#31736](https://github.com/storybookjs/storybook/pull/31736), thanks @kasperpeulen!\n- Core: Delete shim addon packages - [#31728](https://github.com/storybookjs/storybook/pull/31728), thanks @ndelangen!"}}