Bump @module-federation/runtime from 0.15.0 to 0.21.6 in /src-admin

Bumps [@module-federation/runtime](https://github.com/module-federation/core/tree/HEAD/packages/runtime) from 0.15.0 to 0.21.6.
- [Release notes](https://github.com/module-federation/core/releases)
- [Changelog](https://github.com/module-federation/core/blob/main/packages/runtime/CHANGELOG.md)
- [Commits](https://github.com/module-federation/core/commits/v0.21.6/packages/runtime)

---
updated-dependencies:
- dependency-name: "@module-federation/runtime"
  dependency-version: 0.21.6
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src-admin/package.json

@@ -13,7 +13,7 @@
     "devDependencies": {
         "@iobroker/adapter-react-v5": "8.0.13",
         "@iobroker/json-config": "8.0.6",
-        "@module-federation/runtime": "^0.21.4",
+        "@module-federation/runtime": "^0.21.6",
         "@module-federation/vite": "^1.9.0",
         "@mui/icons-material": "^6.5.0",
         "@mui/material": "^6.5.0",