Add section to upgrade guide

docs/data/material/migration/upgrade-to-v7/upgrade-to-v7.md

@@ -23,3 +23,39 @@ The steps you need to take to migrate from Material UI v6 to v7 are described
 This list is a work in progress.
 Expect updates as new breaking changes are introduced.
 :::
+
+### Lab components moved to the main package
+
+The following `@mui/lab` components have been moved to the main package:
+
+- Alert
+- AlertTitle
+- Autocomplete
+- AvatarGroup
+- Pagination
+- PaginationItem
+- Rating
+- Skeleton
+- SpeedDial
+- SpeedDialAction
+- SpeedDialIcon
+- ToggleButton
+- ToggleButtonGroup
+
+To keep using these components, import them from `@mui/material` instead of `@mui/lab`.
+
+```diff
+-import Alert from '@mui/lab/Alert';
++import Alert from '@mui/material/Alert';
+
+-import { Alert } from '@mui/lab';
++import { Alert } from '@mui/material';
+```
+
+Use this codemod to automatically update the imports:
+
+<!-- #npm-tag-reference -->
+
+```bash
+npx @mui/codemod@next v7.0.0/lab-removed-components <path/to/folder>
+```