fix: updated to use hir-def representation

Author: benodiwal

crates/hir/src/display.rs

@@ -192,9 +192,10 @@ fn write_impl_header<'db>(impl_: &Impl, f: &mut HirFormatter<'_, 'db>) -> Result
     let def_id = GenericDefId::ImplId(impl_.id);
     write_generic_params(def_id, f)?;
 
-    if let Some(trait_ref) = impl_.trait_ref(db) {
+    let impl_data = db.impl_signature(impl_.id);
+    if let Some(target_trait) = &impl_data.target_trait {
         f.write_char(' ')?;
-        trait_ref.hir_fmt(f)?;
+        hir_display_with_store(&impl_data.store[target_trait.path], &impl_data.store).hir_fmt(f)?;
         f.write_str(" for")?;
     }