Move migration note a bit further down the list

MIGRATION.md

@@ -2,7 +2,6 @@
 
 - [From version 6.5.x to 7.0.0](#from-version-65x-to-700)
   - [7.0 breaking changes](#70-breaking-changes)
-    - [Story context is prepared before for supporting fine grained updates](#story-context-is-prepared-before-for-supporting-fine-grained-updates)
     - [Dropped support for Node 15 and below](#dropped-support-for-node-15-and-below)
     - [Modern browser support](#modern-browser-support)
     - [React peer dependencies required](#react-peer-dependencies-required)
@@ -18,6 +17,7 @@
     - [Babel mode v7 exclusively](#babel-mode-v7-exclusively)
     - [Importing plain markdown files with `transcludeMarkdown` has changed](#importing-plain-markdown-files-with-transcludemarkdown-has-changed)
     - [7.0 feature flags removed](#70-feature-flags-removed)
+    - [Story context is prepared before for supporting fine grained updates](#story-context-is-prepared-before-for-supporting-fine-grained-updates)
   - [Core addons](#core-addons)
     - [Removed auto injection of @storybook/addon-actions decorator](#removed-auto-injection-of-storybookaddon-actions-decorator)
     - [Addon-backgrounds: Removed deprecated grid parameter](#addon-backgrounds-removed-deprecated-grid-parameter)
@@ -281,12 +281,6 @@ A number of these changes can be made automatically by the Storybook CLI. To tak
 
 ### 7.0 breaking changes
 
-#### Story context is prepared before for supporting fine grained updates
-
-This change modifies the way Storybook prepares stories to avoid reactive args to get lost for fine-grained updates JS frameworks as `SolidJS` or `Vue`. That's because those frameworks handle args/props as proxies behind the scenes to make reactivity work. So when `argType` mapping was done in `prepareStory` the Proxies were destroyed and args becomes a plain object again, losing the reactivity.
-
-For avoiding that, this change passes the mapped args instead of raw args at `renderToCanvas` so that the proxies stay intact. Also decorators will benefit from this as well by receiving mapped args instead of raw args.
-
 #### Dropped support for Node 15 and below
 
 Storybook 7.0 requires **Node 16** or above. If you are using an older version of Node, you will need to upgrade or keep using Storybook 6 in the meantime.
@@ -586,6 +580,12 @@ In 7.0 we've removed the following feature flags:
 | `breakingChangesV7` | This flag is no longer needed and should be deleted.        |
 | `babelModeV7`       | See [Babel mode v7 exclusively](#babel-mode-v7-exclusively) |
 
+#### Story context is prepared before for supporting fine grained updates
+
+This change modifies the way Storybook prepares stories to avoid reactive args to get lost for fine-grained updates JS frameworks as `SolidJS` or `Vue`. That's because those frameworks handle args/props as proxies behind the scenes to make reactivity work. So when `argType` mapping was done in `prepareStory` the Proxies were destroyed and args becomes a plain object again, losing the reactivity.
+
+For avoiding that, this change passes the mapped args instead of raw args at `renderToCanvas` so that the proxies stay intact. Also decorators will benefit from this as well by receiving mapped args instead of raw args.
+
 ### Core addons
 
 #### Removed auto injection of @storybook/addon-actions decorator