Use the prod distribution of React instead of dev in the CDN example (#3402)

* chore: use react prod distribution in cdn example

* update more examples

---------

Co-authored-by: Dimitri POSTOLOV <[email protected]>

Author: kiendang

examples/graphiql-cdn/index.html

@@ -30,11 +30,11 @@
     -->
     <script
       crossorigin
-      src="https://unpkg.com/react@18/umd/react.development.js"
+      src="https://unpkg.com/react@18/umd/react.production.min.js"
     ></script>
     <script
       crossorigin
-      src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"
+      src="https://unpkg.com/react-dom@18/umd/react-dom.production.min.js"
     ></script>
     <!--
       These two files can be found in the npm module, however you may wish to

packages/graphiql-plugin-code-exporter/examples/index.html

@@ -34,11 +34,11 @@
 
     <script
       crossorigin
-      src="https://unpkg.com/react@18/umd/react.development.js"
+      src="https://unpkg.com/react@18/umd/react.production.min.js"
     ></script>
     <script
       crossorigin
-      src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"
+      src="https://unpkg.com/react-dom@18/umd/react-dom.production.min.js"
     ></script>
 
     <script

packages/graphiql-plugin-explorer/examples/index.html

@@ -34,11 +34,11 @@
 
     <script
       crossorigin
-      src="https://unpkg.com/react@18/umd/react.development.js"
+      src="https://unpkg.com/react@18/umd/react.production.min.js"
     ></script>
     <script
       crossorigin
-      src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"
+      src="https://unpkg.com/react-dom@18/umd/react-dom.production.min.js"
     ></script>
 
     <script