mitscheme 11.2 -> 12.1 https://repology.org/project/mit-scheme/versions
attrpath: mitscheme
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There might already be an open PR for this update:
- mitscheme:11.2 -> 12.1 https://www.gnu.org/software/mit-scheme/releas…
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/219414"