fix(ci): fetch yogurt input over https so CI can eval without ssh key

The yogurt flake input was pinned via git+ssh://, which the Gitea CI
runner can't fetch (no GitHub SSH key), failing the eval job. Switch to
git+https:// — repo is anonymously cloneable, same rev/narHash.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

flake.nix

@@ -58,7 +58,7 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
     claude-code.url = "github:sadjow/claude-code-nix";
-    yogurt.url = "git+ssh://git@github.com/ZePedroResende/yogurt";
+    yogurt.url = "git+https://github.com/ZePedroResende/yogurt";
     nix-index-database = {
       url = "github:nix-community/nix-index-database";
       inputs.nixpkgs.follows = "nixpkgs";