Publish code-generation.md (#6948)

Set the hidden tag to false and make this article public.

doc/contribute-to-core-lightning/code-generation.md

@@ -1,7 +1,7 @@
 ---
 title: "Code Generation"
 slug: "code-generation"
-hidden: true
+hidden: false
 createdAt: "2023-04-22T12:29:01.116Z"
 updatedAt: "2023-04-22T12:44:47.814Z"
 ---
@@ -71,4 +71,4 @@ The `cln-grpc` crate is mostly used to provide the primitives to build the `grpc
 - Next it generates the `convert.rs` file which is used to convert the structs for in-memory representation from `cln-rpc` into the corresponding protobuf structs.
 - Finally `msggen` generates the `server.rs` file which can be bound to a grpc endpoint listening for incoming grpc requests, and it will convert the request and forward it to the JSON-RPC. Upon receiving the response it gets converted back into a grpc response and sent back.
 
-![](https://files.readme.io/53b4645-image.png)
+![](https://files.readme.io/53b4645-image.png)