Add async-graphql rust crate

sunli829 · sunli829 · commit 3c5fd2ae0860 · 2020-04-28T16:52:14.000+08:00
diff --git a/site/code/index.html.js b/site/code/index.html.js
@@ -578,6 +578,7 @@ sleep
 ### Rust
 
  - [graphql-rust/juniper](https://github.com/graphql-rust/juniper): GraphQL server library for Rust
+ - [async-graphql/async-graphql](https://github.com/async-graphql/async-graphql): GraphQL server library for Rust
 
 ### Scala
 
