clean: rename bulk_album category

src/bulk_page.py

@@ -17,7 +17,7 @@ page_template = env.get_template('bulk_page.jinja')
 
 class BulkPage():
 
-    def __init__(self, path: Path, name: str, pictures: list[Picture] = None, prev: Page|None = None, next: Page|None = None):
+    def __init__(self, path: Path, name: str, pictures: list[Picture] = None, prev: BulkPage|None = None, next: BulkPage|None = None):
         self.name: str = name
         self._path: Path = path
         self._pictures: list[Picture] = pictures or []