Fix comment in empty type literal (#18364)

changelog_unreleased/typescript/18364.md

@@ -0,0 +1,17 @@
+#### Fix comment in empty type literal (#18364 by @fisker)
+
+<!-- prettier-ignore -->
+```tsx
+// Input
+export type XXX = {
+  // tbd
+};
+
+// Prettier stable
+export type XXX = { // tbd };
+
+// Prettier main
+export type XXX = {
+  // tbd
+};
+```