Bump @mui/monorepo digest to 1a6b5ef

Author: renovate[bot]

package.json

@@ -77,7 +77,7 @@
     "@mui/internal-netlify-cache": "^0.0.2-canary.1",
     "@mui/internal-test-utils": "catalog:",
     "@mui/material": "catalog:",
-    "@mui/monorepo": "github:mui/material-ui#15ff3955e950f3d1ee70b0ea9d9fd8c1057ee0cb",
+    "@mui/monorepo": "github:mui/material-ui#1a6b5efbbc00b6fa0bbec5e0b65c7eed986b6bab",
     "@mui/utils": "catalog:",
     "@next/eslint-plugin-next": "15.5.6",
     "@octokit/plugin-retry": "^8.0.3",