Merge pull request #267653 from aaronjheng/magnetico

magnetico: pin to go1.20

pkgs/top-level/all-packages.nix

···
 
   markscribe = callPackage ../tools/text/markscribe { };
 
-  magnetico = callPackage ../applications/networking/p2p/magnetico { };
+  magnetico = callPackage ../applications/networking/p2p/magnetico {
+    buildGoModule = buildGo120Module;
+  };
 
   mastodon-bot = nodePackages.mastodon-bot;