Fix context type in static generation crate (#2607)

packages/static-generation/src/launch.rs

@@ -10,7 +10,7 @@ pub use crate::Config;
 #[allow(unused)]
 pub fn launch(
     root: fn() -> Element,
-    contexts: Vec<Box<dyn Fn() -> Box<dyn Any> + Send + Sync>>,
+    contexts: Vec<Box<dyn Fn() -> Box<dyn Any + Send + Sync> + Send + Sync>>,
     platform_config: Config,
 ) {
     let virtual_dom_factory = move || {