add key

home-manager/sajenim/features/cli/git.nix

@@ -12,6 +12,7 @@
     extraConfig = {
       init.defaultBranch = "main";
       gpg.format = "ssh";
+      core.sshCommand = "~/.ssh/github_sk.pub";
       user.signingkey = "~/.ssh/signing_sk.pub";
     };
   };