Revert prettier update from #25496 (#25606)

This broke the running of prettier on the json files in the repo
because the prettier-swagger-plugin no longer compiles as there seems
to be a breaking change between prettier 2.x and 3.x. We will need
to further investigate this if we want to take this change.

package.json

@@ -7,14 +7,15 @@
     "@azure-tools/typespec-azure-resource-manager": "0.33.0",
     "@azure-tools/typespec-client-generator-core": "0.33.0",
     "@azure-tools/typespec-providerhub": "0.33.0",
+    "@types/prettier": "^2.7.2",
     "@typespec/compiler": "0.47.0",
     "@typespec/http": "0.47.0",
     "@typespec/openapi": "0.47.0",
     "@typespec/rest": "0.47.0",
     "@typespec/versioning": "0.47.0",
     "@azure/avocado": "^0.8.4",
     "azure-rest-api-specs-eng-tools": "file:eng/tools",
-    "prettier": "~3.0.1",
+    "prettier": "^2.8.8",
     "typescript": "~5.1.3"
   },
   "private": true