Update @mui/x-date-pickers requirement in /src-admin

Updates the requirements on [@mui/x-date-pickers](https://github.com/mui/mui-x/tree/HEAD/packages/x-date-pickers) to permit the latest version.
- [Release notes](https://github.com/mui/mui-x/releases)
- [Changelog](https://github.com/mui/mui-x/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mui/mui-x/commits/v7.6.1/packages/x-date-pickers)

---
updated-dependencies:
- dependency-name: "@mui/x-date-pickers"
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

src-admin/package.json

@@ -15,7 +15,7 @@
         "@mui/icons-material": "^5.15.18",
         "@mui/material": "5.15.19",
         "@mui/styles": "5.15.18",
-        "@mui/x-date-pickers": "^7.5.1",
+        "@mui/x-date-pickers": "^7.6.1",
         "@originjs/vite-plugin-federation": "^1.3.5",
         "@rollup/plugin-babel": "^6.0.4",
         "@rollup/plugin-commonjs": "^25.0.8",