fix: upgrade json-server from 0.16.1 to 0.16.2

Snyk has created this PR to upgrade json-server from 0.16.1 to 0.16.2.

See this package in npm:
https://www.npmjs.com/package/json-server

See this project in Snyk:
https://app.snyk.io/org/gerdesque/project/acd9730a-8dd5-4c49-8d23-b4831e53dcac?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -35,7 +35,7 @@
   "private": true,
   "dependencies": {
     "document-register-element": "1.14.3",
-    "json-server": "^0.16.1",
+    "json-server": "^0.16.2",
     "prop-types": "^15.7.2",
     "ra-data-json-server": "^3.5.3",
     "ra-language-german": "^2.1.2",