fix: check if path is file before relinking

Author: purpletennisball

src/tagstudio/core/utils/missing_files.py

@@ -46,7 +46,7 @@ def match_missing_file_entry(self, match_entry: Entry) -> list[Path]:
                 if part in GLOBAL_IGNORE_SET:
                     skip = True
                     break
-            if skip:
+            if skip or path.is_dir():
                 continue
             if path.name == match_entry.path.name:
                 new_path = Path(path).relative_to(self.library.library_dir)