Update route.md to avoid syntax confusion in docs (#3311)

axum/src/docs/routing/route.md

@@ -4,7 +4,7 @@ Add another route to the router.
 can be either static, a capture, or a wildcard.
 
 `method_router` is the [`MethodRouter`] that should receive the request if the
-path matches `path`. `method_router` will commonly be a handler wrapped in a method
+path matches `path`. Usually, `method_router` will be a handler wrapped in a method
 router like [`get`]. See [`handler`](crate::handler) for more details on handlers.
 
 # Static paths