Upgrade GraphiQL from 5.2.2 to 5.2.3

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: myronmarston

elasticgraph-graphiql/lib/elastic_graph/graphiql/assets.tar.gz

@@ -1,6 +1,6 @@
 The `assets.tar.gz` tarball was built using the `elasticgraph-graphiql/scripts/update_graphiql` script, which
 also updates this file.
 
-It was last run using git ref `graphiql@5.2.2` and it sourced GraphiQL from:
+It was last run using git ref `graphiql@5.2.3` and it sourced GraphiQL from:
 
-https://github.com/graphql/graphiql/tree/graphiql@5.2.2/examples/graphiql-vite
+https://github.com/graphql/graphiql/tree/graphiql@5.2.3/examples/graphiql-vite