Update request entry point file path in architecture.md

src/tools/rust-analyzer/docs/dev/architecture.md

@@ -42,7 +42,7 @@ The underlying engine makes sure that model is computed lazily (on-demand) and c
 `crates/rust-analyzer/src/bin/main.rs` contains the main function which spawns LSP.
 This is *the* entry point, but it front-loads a lot of complexity, so it's fine to just skim through it.
 
-`crates/rust-analyzer/src/handlers/requests.rs` implements all LSP requests and is a great place to start if you are already familiar with LSP.
+`crates/rust-analyzer/src/handlers/request.rs` implements all LSP requests and is a great place to start if you are already familiar with LSP.
 
 `Analysis` and `AnalysisHost` types define the main API for consumers of IDE services.