Allowing manufacturer urls to be null

app/models/manufacturer.py

@@ -8,5 +8,5 @@ class Manufacturer(Base):
 
     id: Mapped[int] = mapped_column(primary_key=True)
     name: Mapped[str] = mapped_column(nullable=False)
-    url: Mapped[str] = mapped_column(nullable=True)
+    url: Mapped[str | None] = mapped_column(nullable=True)
     logo_url: Mapped[str | None] = mapped_column(nullable=True, default=None)