Merge pull request #20743 from thefrontside/tm/use-graphiql-docs-explorer

Replaced GraphiQL in Api Docs with DocExplorer

plugins/api-docs/package.json

@@ -40,11 +40,12 @@
     "@backstage/plugin-catalog": "workspace:^",
     "@backstage/plugin-catalog-react": "workspace:^",
     "@backstage/theme": "workspace:^",
+    "@graphiql/react": "^0.19.4",
     "@material-ui/core": "^4.12.2",
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "4.0.0-alpha.61",
     "@types/react": "^16.13.1 || ^17.0.0",
-    "graphiql": "^1.8.8",
+    "graphiql": "3.0.6",
     "graphql": "^16.0.0",
     "graphql-ws": "^5.4.1",
     "isomorphic-form-data": "^2.0.0",