fix(test): syntax error

Author: ankddev

compiler-core/src/language_server/tests/action.rs

@@ -10699,7 +10699,7 @@ fn annotate_all_top_level_definitions_already_annotated() {
         r#"
 pub const answer: Int = 42
 
-pub fn add_two(thing: Int) -> {
+pub fn add_two(thing: Int) -> Int {
   thing + 2
 }