py39-cartopy @0.21.1: fetch failure

[ryandesign (Ryan Carsten Schmidt)]

​https://build.macports.org/builders/ports-12_arm64-builder/builds/141313/steps/install-port/logs/stdio

--->  Attempting to fetch cartopy-0.21.1.tar.gz from https://files.pythonhosted.org/packages/source/c/cartopy
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
DEBUG: Fetching distfile failed: The requested URL returned error: 404

Caused by [25762f87e587b80d796b35469906959d18647a4c/macports-ports]—the removed line default distname {Cartopy-${version}} needed to have been kept for these older versions.