fix nightly warning legacy_derive_helpers

see rust-lang/rust#79202

Author: PeterW-LWL

crates/rust-analyzer/src/lsp_ext.rs

@@ -230,8 +230,8 @@ pub struct SsrParams {
 
 pub enum StatusNotification {}
 
-#[serde(rename_all = "camelCase")]
 #[derive(Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
 pub enum Status {
     Loading,
     ReadyPartial,

docs/dev/lsp-extensions.md

@@ -1,5 +1,5 @@
 <!---
-lsp_ext.rs hash: 7609fd6d7b4ab231
+lsp_ext.rs hash: 8f1ae8530f69e3a3
 
 If you need to change the above hash to make the test pass, please check if you
 need to adjust this doc as well and ping this  issue: