[material-ui][docs] Audit and copyedit the v6 migration doc

docs/data/material/components/grid/grid.md

@@ -20,7 +20,7 @@ The `Grid` component shouldn't be confused with a data grid; it is closer to a l
 :::
 
 :::warning
-The `Grid` component has been deprecated. Please use the [Grid v2](/material-ui/react-grid2/) instead. See how to migrate in the [Grid v2 migration guide](/material-ui/migration/migration-grid-v2/) and [Material UI v6 migration guide](/material-ui/migration/migrating-to-v6/).
+The `Grid` component has been deprecated. Please use [Grid v2](/material-ui/react-grid2/) instead. See how to migrate in the [Grid v2 migration guide](/material-ui/migration/migration-grid-v2/) and [Material UI v6 upgrade guide](/material-ui/migration/upgrade-to-v6/).
 :::
 
 ## How it works

docs/data/material/migration/migration-grid-v2/migration-grid-v2.md

@@ -80,7 +80,7 @@ The Grid v2 is marked as stable in Material UI v6, so the `Unstable_` prefix is
 ```
 
 Alongside the stabilization, the API has been improved.
-You can see the changes and further details on how to migrate in the [Material UI v6 migration guide](/material-ui/migration/migrating-to-v6/).
+You can see the changes and further details on how to migrate in the [Material UI v6 upgrade guide](/material-ui/migration/upgrade-to-v6/).
 
 Finally, the original Grid component is deprecated and will be removed in the future, so we highly encourage you to migrate to Grid v2.
 

docs/data/material/migration/migrating-to-v6/migrating-to-pigment-css.md → docs/data/material/migration/upgrade-to-v6/migrating-to-pigment-css.md

@@ -2,7 +2,7 @@
 
 <p class="description">This guide helps you integrate Pigment CSS with Material UI v6.</p>
 
-Before going through this guide, make sure you have [migrated to Material UI v6](/material-ui/migration/migrating-to-v6/).
+Before going through this guide, make sure you have [upgraded to Material UI v6](/material-ui/migration/upgrade-to-v6/).
 
 ## Introduction
 

docs/data/material/pages.ts

@@ -277,8 +277,8 @@ const pages: MuiPage[] = [
         subheader: 'Upgrade to v6',
         children: [
           {
-            pathname: '/material-ui/migration/migrating-to-v6',
-            title: 'Migrating to v6: getting started',
+            pathname: '/material-ui/migration/upgrade-to-v6',
+            title: 'Upgrade to v6: getting started',
           },
           {
             pathname: '/material-ui/migration/migrating-from-deprecated-apis',

docs/pages/material-ui/migration/migrating-to-pigment-css.js

@@ -1,6 +1,6 @@
 import * as React from 'react';
 import MarkdownDocs from 'docs/src/modules/components/MarkdownDocs';
-import * as pageProps from 'docs/data/material/migration/migrating-to-v6/migrating-to-pigment-css.md?muiMarkdown';
+import * as pageProps from 'docs/data/material/migration/upgrade-to-v6/migrating-to-pigment-css.md?muiMarkdown';
 
 export default function Page() {
   return <MarkdownDocs {...pageProps} />;

docs/pages/material-ui/migration/migration-css-theme-variables.js

@@ -4,7 +4,7 @@ import {
   demos,
   docs,
   demoComponents,
-} from 'docs/data/material/migration/migrating-to-v6/migration-css-theme-variables.md?muiMarkdown';
+} from 'docs/data/material/migration/upgrade-to-v6/migration-css-theme-variables.md?muiMarkdown';
 
 export default function Page() {
   return <MarkdownDocs demos={demos} docs={docs} demoComponents={demoComponents} />;

docs/pages/material-ui/migration/migrating-to-v6.js → docs/pages/material-ui/migration/upgrade-to-v6.js

@@ -1,6 +1,6 @@
 import * as React from 'react';
 import MarkdownDocs from 'docs/src/modules/components/MarkdownDocs';
-import * as pageProps from 'docs/data/material/migration/migrating-to-v6/migrating-to-v6.md?muiMarkdown';
+import * as pageProps from 'docs/data/material/migration/upgrade-to-v6/upgrade-to-v6.md?muiMarkdown';
 
 export default function Page() {
   return <MarkdownDocs {...pageProps} />;

docs/translations/translations.json

@@ -262,7 +262,7 @@
     "/material-ui/migration/migration-grid-v2": "Migrating to Grid v2",
     "/material-ui/migration/pickers-migration": "Migration from @material-ui/pickers",
     "Upgrade to v6": "Upgrade to v6",
-    "/material-ui/migration/migrating-to-v6": "Migrating to v6: getting started",
+    "/material-ui/migration/upgrade-to-v6": "Upgrade to v6: getting started",
     "/material-ui/migration/migrating-from-deprecated-apis": "Migrating from deprecated APIs",
     "/material-ui/migration/migration-css-theme-variables": "Migrating to CSS theme variables",
     "/material-ui/migration/migrating-to-pigment-css": "Migrating to Pigment CSS",