Update dependency @mitodl/smoot-design to v6

Author: renovate[bot]

package.json

@@ -19,7 +19,7 @@
     "@emotion/react": "^11.11.1",
     "@emotion/styled": "^11.11.0",
     "@faker-js/faker": "^9.0.0",
-    "@mitodl/smoot-design": "^1.1.1",
+    "@mitodl/smoot-design": "^6.0.0",
     "@mitodl/unified-ecommerce-api-axios": "^2025.2.11",
     "@mui/material": "^6.1.8",
     "@mui/material-nextjs": "^6.1.8",