fix: fallback to "Untitled" as filename if empty string is passed as …

…filename to `tp.file.create_new`

refs: #1332

src/core/Templater.ts

@@ -142,7 +142,7 @@ export class Templater {
  const created_note = await errorWrapper(async () => {
  const path = app.vault.getAvailablePath(
  normalizePath(
- `${folder?.path ?? ""}/${filename ?? "Untitled"}`
+ `${folder?.path ?? ""}/${filename || "Untitled"}`
  ),
  extension
  );