Bump MUI X to 8.21.0

Author: renovate[bot]

docs/package.json

@@ -41,15 +41,15 @@
     "@mui/system": "workspace:^",
     "@mui/types": "workspace:^",
     "@mui/utils": "workspace:^",
-    "@mui/x-charts": "8.17.0",
-    "@mui/x-data-grid": "8.17.0",
-    "@mui/x-data-grid-generator": "8.17.0",
-    "@mui/x-data-grid-premium": "8.17.0",
-    "@mui/x-data-grid-pro": "8.17.0",
-    "@mui/x-date-pickers": "8.17.0",
-    "@mui/x-date-pickers-pro": "8.17.0",
-    "@mui/x-license": "8.17.0",
-    "@mui/x-tree-view": "8.17.0",
+    "@mui/x-charts": "8.21.0",
+    "@mui/x-data-grid": "8.21.0",
+    "@mui/x-data-grid-generator": "8.21.0",
+    "@mui/x-data-grid-premium": "8.21.0",
+    "@mui/x-data-grid-pro": "8.21.0",
+    "@mui/x-date-pickers": "8.21.0",
+    "@mui/x-date-pickers-pro": "8.21.0",
+    "@mui/x-license": "8.21.0",
+    "@mui/x-tree-view": "8.21.0",
     "@popperjs/core": "^2.11.8",
     "@react-spring/web": "^10.0.3",
     "@tailwindcss/postcss": "^4.1.17",